RESUMO
Four edible mushrooms, Panellus serotinus, Lepista nuda, Tricholoma matsutake and Naematoloma sublateritium, have been investigated chemically. Two new sterols, 5alpha,9alpha-epidioxy-(22E)-ergosta-7,22-diene-3beta,6alpha-diol (1) and 5alpha,9alpha-epidioxy-(22E)-ergosta-7,22-diene-3beta,6beta-diol (2), have been isolated from Panellus serotinus. Compound 2 was also isolated from Lepista nuda. A new sterol, 3beta,5alpha,9alpha,14beta-tetrahydroxy-(22E)-ergosta-7,22-dien-6-one (3), and compound 2 have been isolated from Tricholoma matsutake. Three new triterpenoids, sublateriols A-C (4-6), have been isolated from Naematoloma sublateritium. The structures of the new compounds were elucidated on the basis of their spectral data.
Assuntos
Agaricales/química , Esteróis/química , Triterpenos/química , Indicadores e Reagentes , Espectroscopia de Ressonância Magnética , Espectrometria de Massas , Conformação Molecular , Espectrofotometria Infravermelho , Espectrofotometria Ultravioleta , Esteróis/isolamento & purificação , Triterpenos/isolamento & purificaçãoRESUMO
Five new monoterpene glycosides, ovatolactone 7-O-(6'-O-p-hydroxybenzoyl)-beta-D-glucopyranoside, ovatic acid methyl ester 7-O-(6'-O-p-hydroxybenzoyl)-beta-D-glucopyranoside, 7-O-p-hydroxybenzoylovatol 1-O-(6'-O-p-hydroxybenzoyl)-beta-D-glucopyranoside, 6'-O-p-hydroxybenzoylcatalposide and (2E,6R)-2,6-dimethyl-8-hydroxy-2-octenoic acid 8-O-[6'-O-(E)-p-coumaroyl]-beta-D-glucopyranoside were isolated from the fallen leaves of Catalpa ovata G. Don. Their structures were determined by extensive spectroscopic studies and syntheses.
Assuntos
Glicosídeos/isolamento & purificação , Magnoliopsida/química , Terpenos/isolamento & purificação , Configuração de Carboidratos , Glicosídeos/química , Folhas de Planta/química , Análise Espectral , Terpenos/químicaRESUMO
Two new secoiridoid glycosides, 4'-O-beta-D-glucopyranosylgentiopicroside (1) and 6'-O-beta-D-glucopyranosylgentiopicroside (2), have been isolated from the rhizomes and roots of Gentiana scabra together with three known compounds, olivieroside, 1-O-beta-D-glucopyranosylamplexine, and benzyl alcohol O-alpha-L-arabinopyranosyl (1 --> 6)-beta-D-glucopyranoside. The structures of 1 and 2 were elucidated using chemical and physicochemical (MS and NMR) studies.
Assuntos
Gentianaceae/química , Glicosídeos/isolamento & purificação , Plantas Medicinais/química , Piranos/isolamento & purificação , China , Cromatografia Gasosa , Cromatografia Líquida de Alta Pressão , Glicosídeos/química , Estrutura Molecular , Ressonância Magnética Nuclear Biomolecular , Piranos/química , Rizoma/química , Espectrofotometria UltravioletaRESUMO
Four new phytosphingosine-type ceramides, (2S,3S,4R)-2-[(2'R)-2'-hydroxydocosanoylamino]-1,3,4-octadecane triol (1), (2S,3S,4R)-2-[(2'R)-2'-hydroxytricosanoylamino]-1,3,4-octadecan etriol (2), (2S,3S,4R)-2-[(2'R)-2'-hydroxypentacosanoylamino]-1,3,4-octadec anetriol (3) and (2S,3S,4R)-2-[(2'R)-2'-hydroxyhexacosanoylamino]-1,3,4-octadeca netriol (4), have been isolated from the fruit bodies of Grifola frondosa. The structures of the new compounds were elucidated on the basis of their spectral data.
Assuntos
Ceramidas/química , Polyporaceae/química , Espectroscopia de Ressonância Magnética , Pós , Espectrometria de Massas de Bombardeamento Rápido de ÁtomosRESUMO
Four new terpenoids, gardenate A (1), 2-hydroxyethyl gardenamide A (2), (1R,7R,8S,10R)-7,8,11-trihydroxyguai-4-en-3-one 8-O-beta-D-glucopyranoside (3) and Jasminoside F (4), were isolated from Gardeniae Fructus. Their structures were established on the basis of spectral analysis.
Assuntos
Plantas Medicinais/química , Terpenos/química , Dicroísmo Circular , Frutas/química , Espectroscopia de Ressonância Magnética , Rotação Ocular , Espectrofotometria Ultravioleta , Terpenos/isolamento & purificaçãoRESUMO
Two new sterols, (22E)-23-methylergosta-5,7,22-trien-beta-ol (1) and 5alpha,6alpha-epoxy-(22E)-ergosta-8,14,22-triene -3beta,7alpha-diol (2), have been isolated from two edible mushrooms, Lentinula edodes and Tricholoma matsutake, respectively, together with twelve known ones (3-14). The structures of the new compounds were elucidated on the basis of their spectral data.
Assuntos
Agaricales/química , Ergosterol/análogos & derivados , Esteróis/química , Ergosterol/química , Ergosterol/isolamento & purificação , Espectrometria de Massas , Espectrofotometria Infravermelho , Espectrofotometria UltravioletaRESUMO
Two secoiridoid glycosides, loniceracetalides A and B, were isolated in very small amounts, together with 10 known iridoid glycosides, from the flower buds of Lonicera japonica. The structures of loniceracetalides A and B were determined by spectroscopic analysis.
Assuntos
Glicosídeos/isolamento & purificação , Magnoliopsida/química , Glicosídeos/química , Espectroscopia de Ressonância Magnética , Conformação MolecularRESUMO
Two new iridoid glucosides, named iso-8-epikingiside and 8-demethyl-7-ketologanin, were isolated together with 8-epikingiside, kingiside, ligustroside, 10-hydroxyligustroside, ligustaloside A and ligustaloside B from the leaves of Ligustrum lucidum AIT. (Oleaceae). The stereochemical structures of these new compounds were elucidated on the basis of spectroscopic evidence.