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1.
J Asian Nat Prod Res ; : 1-6, 2020 Jan 24.
Artigo em Inglês | MEDLINE | ID: mdl-31979983

RESUMO

Two new compounds named asperpenes D (1) and E (2) were isolated from the marine-derived fungus Aspergillus sp. SCS-KFD66. Their structures were determined on the basis of spectroscopic methods. Compound 2 represents the first natural product bearing a 2-substituted-5-oxo-4-phenyl-2,5-dihydrofuran-3-carboxylic acid skeleton. All the compounds were tested for enzyme inhibitory activity against AChE and α-glucosidase and DPPH radical scavenging activity, respectively.

2.
J Nat Prod ; 82(12): 3456-3463, 2019 Dec 27.
Artigo em Inglês | MEDLINE | ID: mdl-31823605

RESUMO

Seven new quinazoline-containing indole alkaloids (1-7) named aspertoryadins A-G, along with nine known ones (8-16), were isolated from the marine-derived fungus Aspergillus sp. HNMF114 from the bivalve mollusk Sanguinolaria chinensis. The structures of the new compounds were elucidated from spectroscopic data, X-ray diffraction analysis, ECD spectra analysis, and ECD calculations. Compound 1 bears an aminosulfonyl group in the structure, which is rarely encountered in natural products. Compounds 6, 7, and 13 exhibited quorum sensing inhibitory activity against Chromobacterium violaceum CV026 with MIC values of 32, 32, and 16 µg/well, respectively.

3.
J Asian Nat Prod Res ; : 1-7, 2019 Oct 03.
Artigo em Inglês | MEDLINE | ID: mdl-31580152

RESUMO

Seven compounds were isolated from a marine-derived fungus Aspergillus sp. ZF-79, including three new polyketides (1-3), named asperochrins D-F, along with four known compounds 4-7. Their structures were determined on the basis of spectroscopic methods. All the compounds were tested for quorum sensing inhibitory (QSI) activity. Compounds 1, 3, 4, 5, and 6 exhibited QSI activity against Chromobacterium violaceum CV026 with MIC values of 50, 100, 50, 50, and 6.25 µM, respectively.

4.
Nat Prod Res ; : 1-8, 2019 Oct 16.
Artigo em Inglês | MEDLINE | ID: mdl-31617416

RESUMO

Three new 5,6,7,8-tetrahydro-2-(2-phenylethyl)chromones and one new dimeric 2-(2-phenylethyl)chromone were isolated from the agarwood of Aquilaria crassna Pierre ex Lecomte in Laos. The structures of the isolates were elucidated by spectroscopic methods, and their configurations were determined via ROESY correlations, 3JH-H coupling constants analyses, comparisons of chemical shifts and specific rotations with known compounds, and ECD calculation in the case of 1. Compounds 1-4 were evaluated for their cytotoxicity. Compounds 1 and 2 exhibited weak cytotoxicity toward HeLa cell line (IC50: 49.8 ± 1.2 µM) and K562 cell line (IC50: 42.66 ± 0.47 µM), respectively.

5.
J Nat Prod ; 82(9): 2638-2644, 2019 Sep 27.
Artigo em Inglês | MEDLINE | ID: mdl-31469560

RESUMO

Five new indole-terpenoids named penerpenes E-I (1-5), along with seven known ones (6-12), were isolated from the marine-derived fungus Penicillium sp. KFD28 from a bivalve mollusk, Meretrix lusoria. The structures of the new compounds were elucidated from spectroscopic data and ECD spectroscopic analyses. Compound 1 was assigned as an indole-diterpenoid with a unique 6/5/5/6/6/5/5 heptacyclic ring system. Compound 2 represents an indole-diterpenoid with a new carbon skeleton derived from paxilline by the loss of three carbons (C-23/24/25). Compound 3 contains an additional oxygen atom between C-21 and C-22 compared to paxilline to form an unusual 6/5/5/6/6/7 hexacyclic ring system bearing a 1,3-dioxepane ring, which is rarely encountered in natural products. Compounds 1, 2, 4, and 6 showed inhibitory activities against protein tyrosine phosphatase 1B (PTP1B) with IC50 values of 14, 27, 23, and 13 µM, respectively.

6.
Org Lett ; 21(12): 4864-4867, 2019 Jun 21.
Artigo em Inglês | MEDLINE | ID: mdl-31188002

RESUMO

Four unusual indole-terpenoids, penerpenes A-D (1-4), along with two known ones paxilline (5) and emindole SB (6), were isolated from the marine-derived fungus Penicillium sp. KFD28. The absolute structures of 1-4 were elucidated on the basis of spectroscopic data and ECD spectra analysis along with quantum ECD calculations. Compounds 1 and 2 showed potent inhibitory activity toward protein tyrosine phosphatases (PTP1B and TCPTP). Plausible biosynthetic pathways of compounds 1-4 are proposed.

7.
Mar Drugs ; 17(4)2019 Apr 11.
Artigo em Inglês | MEDLINE | ID: mdl-30978939

RESUMO

Four new ansamycins, named divergolides T-W (1-4), along with two known analogs were isolated from the fermentation broth of the mangrove-derived actinomycete Streptomyces sp. KFD18. The structures of the compounds, including the absolute configurations of their stereogenic carbons, were determined by spectroscopic data and single-crystal X-ray diffraction analysis. Compounds 1-4 showed cytotoxic activity against the human gastric cancer cell line SGC-7901, the human leukemic cell line K562, the HeLa cell line, and the human lung carcinoma cell line A549, with 1 being the most active while compounds 5 and 6 were inactive against all the tested cell lines. Compounds 1 and 3 showed very potent and specific cytotoxic activities (IC50 2.8 and 4.7 µM, respectively) against the SGC-7901 cells. Further, the apoptosis-inducing effect of 1 and 3 against SGC-7901 cells was demonstrated by two kinds of staining methods for the first time.


Assuntos
Antibióticos Antineoplásicos/farmacologia , Apoptose/efeitos dos fármacos , Lactamas Macrocíclicas/farmacologia , Streptomyces/química , Antibióticos Antineoplásicos/química , Antibióticos Antineoplásicos/isolamento & purificação , Linhagem Celular Tumoral , Cristalografia por Raios X , Ensaios de Seleção de Medicamentos Antitumorais , Humanos , Lactamas Macrocíclicas/química , Lactamas Macrocíclicas/isolamento & purificação , Estrutura Molecular , Áreas Alagadas
8.
Zhongguo Zhong Yao Za Zhi ; 44(3): 489-494, 2019 Feb.
Artigo em Chinês | MEDLINE | ID: mdl-30989913

RESUMO

Chemical constituents were isolated from the fruiting bodies of Ganoderma australe by various column chromatographic techniques and HPLC method, and their chemical structures were identified through the combined analysis of physicochemical properties and spectral data. Meanwhile, their α-glucosidase inhibitory activity and anti-oxidative ability were evaluated. Seven compounds were isolated from G. australe and were identified as 6-methoxyl-cyclo-(Phe-Ile)(1), applanoxidic acid A methyl ester(2), ergosta-7,22 E-dien-3ß-ol(3), cinnamic acid(4), 5α,8α-epidioxy-(20S,22E,24R)-ergosta-6,22-diene-3ß-ol(5), 1-(3, 4-dihydroxyphenyl) ethanone(6), salicylic acid(7) and benzoic acid(8). Among the compounds, compound 1 was a new cyclic dipeptide. Compound 2 was a new lanosta natural product, and compounds 4, 6, 7 and 8 were obtained from G. australe for the first time. Moreover, compounds 4 and 8 exhibited α-glucosidase inhibitory activity with inhibition rates of 36.8% and 34.7%, and compounds 4, 7 and 8 had a certain activity in DPPH free radical scavenging activity with IC_(50) values of 0.168, 0.458 and 0.170 g·L~(-1), respectively. The DPPH radical scavenging rate of compound 1 was 41.1%.


Assuntos
Carpóforos/química , Ganoderma/química , Depuradores de Radicais Livres/isolamento & purificação , Inibidores de Glicosídeo Hidrolases/isolamento & purificação , Estrutura Molecular
9.
Fitoterapia ; 134: 182-187, 2019 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-30825575

RESUMO

Five optically active epoxy-5,6,7,8-tetrahydro-2-(2-phenylethyl)chromone derivatives (1-5) with four chirality centers in the condensed cyclohexene ring were isolated from artificial holing agarwood originating from Aquilaria sinensis (Lour.) Gilg. Their structures were elucidated by spectroscopic techniques (UV, IR, 1D and 2D NMR) and MS analyses. The absolute configuration of 2 was elucidated by TDDFT-ECD calculations and ECD spectra of 1, 3-5 allowed their configurational assignment as well. All of the new compounds contained a condensed oxirane ring, and compound 1 was the only 6,7-epoxy-2-(2-phenylethyl)-5,6,7,8-tetrahydrochromone derivative that has ever been found in agarwood. AChE inhibitory activity was tested for the first time of these new compounds by using modified Ellman's colorimetric method. Compounds 3 and 5 exhibited inhibitory activity against AChE with IC50 value of 441.6, and 155.6 µM, respectively.


Assuntos
Cromonas/farmacologia , Thymelaeaceae/química , Madeira/química , China , Inibidores da Colinesterase/isolamento & purificação , Inibidores da Colinesterase/farmacologia , Cromonas/isolamento & purificação , Estrutura Molecular , Compostos Fitoquímicos/isolamento & purificação , Compostos Fitoquímicos/farmacologia
10.
Molecules ; 24(3)2019 Feb 06.
Artigo em Inglês | MEDLINE | ID: mdl-30736275

RESUMO

Two new 2-(2-phenylethyl)chromone derivatives (1⁻2), comprising 5,6,7,8-tetrahydro-2-(2-phenylethyl)chromone and benzylacetone moieties, together with one new 2-(2-phenylethenyl)chromone (3) were isolated from the ethyl acetate extraction of agarwood originated from Gyrinops salicifolia Ridl. All structures were unambiguously elucidated on the basis of 1D and 2D NMR spectra as well as by HRESIMS data. All isolated compounds were tested for acetylcholinesterase (AChE) inhibitory activity and cytotoxic activity against human myeloid leukemia cell line (K562). However, none of the compounds displayed AChE inhibitory activity at a concentration of 50 µg mL-1 or cytotoxic activity against K562 cell line.


Assuntos
Flavonoides/química , Thymelaeaceae/química , Linhagem Celular Tumoral , Flavonoides/farmacologia , Humanos , Espectroscopia de Ressonância Magnética/métodos , Estrutura Molecular , Relação Estrutura-Atividade
11.
Phytochemistry ; 159: 208-215, 2019 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-30634083

RESUMO

Twelve undescribed compounds including six phenanthrene derivatives (parviphenanthrines A-F), two stilbene derivatives (parvistilbines A-B), three esters (parviesters A-C), and one sesquiterpenoid (parvidiol A) were isolated from the roots of Stemona parviflora, together with twenty-two known ones. The structures of the undescribed compounds were elucidated based on the analyses of their spectroscopic data. The absolute configuration of parviphenanthrine A was determined by the quantum ECD calculations. Parviphenanthrines A and E, stemanthrene A, stilbostenin E, 4-hydroxy-benzenepropanol-α-benzoate, and (E)-4-hydroxycinnamic acid methyl ester showed nematocidal activity against Meloidogyne incognita with IC50 values of 14.02 ±â€¯0.32, 2.51 ±â€¯0.13, 17.10 ±â€¯0.65, 2.05 ±â€¯0.07, 4.22 ±â€¯0.31, and 1.07 ±â€¯0.05 µM, respectively.


Assuntos
Antinematódeos/farmacologia , Compostos Fitoquímicos/química , Extratos Vegetais/farmacologia , Raízes de Plantas/química , Stemonaceae/química , Concentração Inibidora 50 , Estrutura Molecular
12.
J Asian Nat Prod Res ; 21(5): 449-455, 2019 May.
Artigo em Inglês | MEDLINE | ID: mdl-29671341

RESUMO

Chemical investigation on the cultures of the fungus Cordyceps spp., a strain from cell fusion between Cordyceps militaris and Cordyceps cicadae, resulted in the isolation of 13 compounds including 2 new ones named 2-(5-(3-oxobutyl) furan-2-yl) acetic acid (1) and cordycepone (2). Their structures were elucidated from the analysis of 1D/2D NMR and CD data. Among them, compounds 1, 7-9, at a concentration of 50 µg/ml, showed weak inhibitory activity against AChE. Moreover, compounds 6, 9, and 11 showed moderate inhibitory activity against the nematode Panagrellus redivivus with mortality ratio of 79.0, 71.7, and 72.3% at 2.5 mg/ml, respectively.


Assuntos
Fusão Celular , Cordyceps/química , Cordyceps/citologia , Acetilcolinesterase , Animais , Anti-Helmínticos/química , Anti-Helmínticos/farmacologia , Bioensaio , Inibidores da Colinesterase/química , Inibidores da Colinesterase/farmacologia , Furanos/química , Furanos/metabolismo , Estrutura Molecular , Nematoides/efeitos dos fármacos
13.
Molecules ; 23(11)2018 Nov 20.
Artigo em Inglês | MEDLINE | ID: mdl-30463280

RESUMO

Six new phragmalin limonoids, named moluccensin Z1 (1), moluccensin Z2 (2), carapanolide Y (3), tabulalin N (4), chukvelutilide A1 (5), and velutinasin J (6), as well as two known compounds, chukvelutilide A (7) and velutinasin D (8) were isolated from the stems of Chukrasia tabularis A. Juss. The structures of the new compounds 1⁻6 were confirmed by spectroscopic methods, including IR and HRESIMS, as well as 1D and 2D NMR, and by comparisons with the data of known analogues. All compounds were tested for α-glucosidase and acetylcholinesterase inhibitory activities. However, none of the compounds was active against α-glucosidase and acetylcholinesterase in vitro.


Assuntos
Limoninas/isolamento & purificação , Meliaceae/química , Limoninas/química , Estrutura Molecular , Ressonância Magnética Nuclear Biomolecular , Extratos Vegetais/química , Caules de Planta/química
14.
Mar Drugs ; 16(12)2018 Nov 26.
Artigo em Inglês | MEDLINE | ID: mdl-30486303

RESUMO

Five new compounds named asperpenes A-C (1⁻3), 12,13-dedihydroversiol (4), and methyl 6-oxo-3,6-dihydro-2H-pyran-4-carboxylate (5), along with 10 known compounds (6⁻15), were isolated from the fermentation broth of Aspergillus sp. SCS-KFD66 associated with a bivalve mollusk, Sanguinolaria chinensis, collected from Haikou Bay, China. The structures of the compounds, including the absolute configurations of their stereogenic carbons, were unambiguously determined by spectroscopic data, single-crystal X-ray diffraction analysis, and electronic circular dichroism (ECD) spectral analysis, along with quantum ECD calculations. The growth inhibitory activity of the compounds against four pathogenic bacterial (Escherichia coli ATCC 25922, Staphylococcus aureus ATCC 6538, Listeria monocytogenes ATCC 1911, and Bacillus subtilis ATCC 6633), their enzyme inhibitory activities against acetylcholinesterase and α-glucosidase, and their DPPH radical scavenging activity were evaluated.


Assuntos
Organismos Aquáticos/metabolismo , Aspergillus/metabolismo , Bactérias/efeitos dos fármacos , Produtos Biológicos/farmacologia , Bivalves/microbiologia , Acetilcolinesterase/química , Animais , Antibacterianos/química , Antibacterianos/isolamento & purificação , Antibacterianos/farmacologia , Produtos Biológicos/química , Produtos Biológicos/isolamento & purificação , Compostos de Bifenilo/antagonistas & inibidores , China , Inibidores da Colinesterase/química , Inibidores da Colinesterase/isolamento & purificação , Inibidores da Colinesterase/farmacologia , Dicroísmo Circular , Cristalografia por Raios X , Depuradores de Radicais Livres/química , Depuradores de Radicais Livres/isolamento & purificação , Depuradores de Radicais Livres/farmacologia , Inibidores de Glicosídeo Hidrolases/química , Inibidores de Glicosídeo Hidrolases/isolamento & purificação , Inibidores de Glicosídeo Hidrolases/farmacologia , Testes de Sensibilidade Microbiana , Estrutura Molecular , Picratos/antagonistas & inibidores , alfa-Glucosidases/química
15.
J Nat Prod ; 81(8): 1869-1876, 2018 08 24.
Artigo em Inglês | MEDLINE | ID: mdl-30070829

RESUMO

Streptococcus agalactiae is a hazardous pathogen that can cause great harm to humans and fish. In the present study, the known fungal metabolite helvolic acid (10), seven new helvolic acid derivatives named 16- O-deacetylhelvolic acid 21,16-lactone (2), 6- O-propionyl-6,16- O-dideacetylhelvolic acid 21,16-lactone (3), 1,2-dihydro-6,16- O-dideacetylhelvolic acid 21,16-lactone (4), 1,2-dihydro-16- O-deacetylhelvolic acid 21,16-lactone (5), 16- O-propionyl-16- O-deacetylhelvolic acid (6), 6- O-propionyl-6- O-deacetylhelvolic acid (7), and 24- epi-6ß,16ß-diacetoxy-25-hydroxy-3,7-dioxo-29-nordammara-1,17(20)-diene-21,24-lactone (9), and two known ones (1 and 8) were isolated from the marine-derived fungus Aspergillus fumigatus HNMF0047 obtained from an unidentified sponge from Wenchang Beach, Hainan Province, China. The structures and the absolute configurations of the new compounds were unambiguously elucidated by spectroscopic data and electronic circular dichroism (ECD) spectroscopic analyses along with quantum ECD calculations. In addition, the spectroscopic data of compound 1 are reported here for the first time, the configuration of C-24 of known compound 8 was revised based on comparison of its ROESY data with its C-24 epimer 9, and the absolute configuration of 8 was also determined for the first time. Compounds 6, 7, and 10 showed stronger antibacterial activity than a tobramycin control against S. agalactiae with MIC values of 16, 2, and 8 µg/mL, respectively.


Assuntos
Antibacterianos/química , Antibacterianos/farmacologia , Aspergillus fumigatus/química , Ácido Fusídico/análogos & derivados , Streptococcus agalactiae/efeitos dos fármacos , Dicroísmo Circular , Ácido Fusídico/química , Ácido Fusídico/farmacologia , Espectroscopia de Ressonância Magnética , Testes de Sensibilidade Microbiana , Conformação Molecular , Estrutura Molecular , Tobramicina/farmacologia
16.
Fitoterapia ; 128: 20-25, 2018 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-29723562

RESUMO

Five new amide alkaloids (1-3, 5-6) were isolated from the seeds of Clausena lansium together with one new natural product (4) and four known analogues (7-10). The structures of the new amide alkaloids were elucidated based on a comprehensive spectroscopic data analysis including 1D and 2D NMR as well as HRESIMS, and by comparison with the literature. The bioactivity results showed that compound 8 expressed potent nematicidal activity against Panagrellus redivevus, with IC50 value of 0.12 mM, while compounds 3 and 5 presented moderate nematicidal activity with IC50 values of 2.75 and 3.93 mM, respectively (abamectin as the positive control with IC50 value of 1.05 mM).


Assuntos
Alcaloides/isolamento & purificação , Amidas/isolamento & purificação , Anti-Helmínticos/isolamento & purificação , Clausena/química , Sementes/química , Alcaloides/farmacologia , Amidas/farmacologia , Animais , Anti-Helmínticos/farmacologia , Estrutura Molecular , Tylenchida/efeitos dos fármacos
17.
Fitoterapia ; 125: 49-54, 2018 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-29269234

RESUMO

Seven new compounds, including four new chlorinated diphenyl ethers, namely chrysines A-D (1-4), one new dichlorinated xanthone, chrysoxanthone (5), dichloroorcinol (6), and one new benzeneacetic acid derivative, 3-isopentyl-4-hydroxy phenylacetic acid methyl ester (7), along with fourteen known compounds (8-21), were isolated from a deep-sea-derived fungus Penicillium chrysogenum SCSIO 41001. Their structures were determined by extensive spectroscopic methods and X-ray single-crystal diffraction analysis. All of the isolated compounds (1-21) were evaluated for their α-glucosidase inhibitory activity using PNPG method. Among them, nine compounds (2, 3, 5, 6, 8, 9, 13, 17, and 18) exhibited inhibitory activity against α-glucosidase with IC50 values of 0.35, 0.20, 0.04, 0.16, 0.15, 0.09, 0.14, 0.14, and 0.12mM, respectively (IC50 0.28mM for the positive control acarbose).


Assuntos
Inibidores de Glicosídeo Hidrolases/isolamento & purificação , Éteres Difenil Halogenados/isolamento & purificação , Penicillium chrysogenum/química , Xantonas/isolamento & purificação , Estrutura Molecular , Água do Mar/microbiologia , alfa-Glucosidases
18.
Phytochemistry ; 145: 207-213, 2018 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-29202319

RESUMO

Six previously undescribed uncommon ester-bonded dimeric compounds (aquilacrassnins A-F) containing a sesquiterpenoid and a 5,6,7,8-tetrahydroxy-2-(2-phenylethyl)-5,6,7,8-tetrahydro -4H-chromone units were isolated from the EtOAc extract of agarwood originating from Aquilaria crassna. Their structures were elucidated by spectroscopic (NMR, UV, IR, MS, and ECD) methods. All the compounds were tested for AChE inhibitory activity and cytotoxicity against K562, BEL-7402, SGC-7901, Hela, and A549 tumor cell lines. The results showed that aquilacrassnin A, B, and E exhibited weak cytotoxicity against the five tested cell lines, whereas all the compounds were inactive against AChE.


Assuntos
Antineoplásicos Fitogênicos/farmacologia , Cromonas/farmacologia , Thymelaeaceae/química , Antineoplásicos Fitogênicos/química , Antineoplásicos Fitogênicos/isolamento & purificação , Linhagem Celular Tumoral , Proliferação de Células/efeitos dos fármacos , Sobrevivência Celular/efeitos dos fármacos , Cromonas/química , Cromonas/isolamento & purificação , Relação Dose-Resposta a Droga , Ensaios de Seleção de Medicamentos Antitumorais , Humanos , Estrutura Molecular , Relação Estrutura-Atividade
19.
J Asian Nat Prod Res ; 20(3): 249-254, 2018 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-28508676

RESUMO

Two new compounds, philippin (1) and 3ß,9α,14α-trihydroxy-(22E,24R)-ergost-22-en-7-one (2), were isolated from the fruiting bodies of Ganoderma philippii. Their structures were elucidated on the basis of the spectroscopic technologies, including 1D and 2D NMR as well as MS. The bioassay of inhibitory activity against acetylcholinesterase (AChE) showed compound 1 exhibited weak inhibitory activity against AChE.


Assuntos
Inibidores da Colinesterase/isolamento & purificação , Ergosterol/análogos & derivados , Ganoderma/química , Hidroquinonas/isolamento & purificação , Acetilcolinesterase/efeitos dos fármacos , Inibidores da Colinesterase/química , Inibidores da Colinesterase/farmacologia , Ergosterol/química , Ergosterol/isolamento & purificação , Carpóforos/química , Hidroquinonas/química , Estrutura Molecular , Ressonância Magnética Nuclear Biomolecular
20.
J Asian Nat Prod Res ; 20(2): 122-127, 2018 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-28984476

RESUMO

Two new 2-(2-hydroxy-2-phenylethyl)chromones (1‒2), along with three known 2-(2-phenylethyl)chromones (3‒5), were isolated from the agarwood originating from Aquilaria crassna Pierre ex Lecomte. Their structures were determined by the spectroscopic methods including 1D and 2D NMR analysis and comparison with reported data in the literature. All the compounds were isolated from agarwood of A. crassna for the first time. Compounds 1 and 2 exhibited inhibitory activity against acetylcholinesterase (AChE) with 17.4 ± 0.6 and 15.8 ± 0.7%, respectively, at a concentration of 50 µg/ml. Besides, Compound 3 expressed antibacterial activities against Ralstonia solanacearum with diameter of the inhibition zone of 6.80 ± 0.08 mm at a concentration of 10 mg/ml.


Assuntos
Benzopiranos/isolamento & purificação , Inibidores da Colinesterase/isolamento & purificação , Medicamentos de Ervas Chinesas/isolamento & purificação , Thymelaeaceae/química , Antibacterianos/química , Antibacterianos/isolamento & purificação , Antibacterianos/farmacologia , Benzopiranos/química , Benzopiranos/farmacologia , Inibidores da Colinesterase/química , Inibidores da Colinesterase/farmacologia , Medicamentos de Ervas Chinesas/química , Medicamentos de Ervas Chinesas/farmacologia , Flavonoides/química , Estrutura Molecular , Ressonância Magnética Nuclear Biomolecular , Madeira/química
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