[Study on the coumarin glucosides of Angelica dahurica].

OBJECTIVE: To study the coumarin glucosides of Angelica dahurica. METHODS: Fresh roots and rhizomes of Angelica dahurica were extracted with ethanol at room temperature. Repeated column chromatography and preparative HPLC were used to isolate and purify the compounds. Their structures were elucidated on the basis of chemical evidence and spectral analysis. RESULTS: Twenty-six coumarin glucosides were isolated from Angelica dahurica, while here we reported 7 of them: sec.-O-beta-D-Galactopyranosyl-(R)-byakangelicin (I);8-O-beta-D-Galactopyranosyl-xanthotoxol (II); 7-O-beta-D-Apiofuranosyl-(1-->6)-beta-D-Glucopyranosyl-peucedanol (III); (R)-peucedanol-7-O-beta-D-Glucopyranoside (IV); sec.-O-beta-D-Glucopyranosyl-(R)-Oxypeucedaninhydrate (V); 7-O-beta-D-Galactopyranosyl-Sco-poletin( VI); Aesculin (VII). CONCLUSION: Compound V is a new compound, Compound VII is isolated from Umbellifera for the first time, compounds III, IV are isolated from Angelica for the first time,while compound I, II and VI are isolated from this plant for the first time.

[Studies on the chemical constituents from stems and leaves of Lonicera macranthoides].

OBJECTIVE: To research the chemical constituents from stems and leaves of Lonicera macranthoides. METHODS: Various column chromatographies were employed to isolate and purify the constituents. Their structures were elucidated by spectral analysis (IR, MS, 1H-NMR, 13 C-NMR) and chemical evidence. RESULTS: Nine constituents were obtained and identified as loganin (I), loganic acid (II), morroniside (III),7-O-ethyl-morroniside (IV), scopoletin (V), caffeic acid (VI), chlorogenic acid (VII), beta-sitosterol (VIII), daucosterol (IX). CONCLUSION: Compounds I-VI are isolated from the plant for the first time. All the compounds are found for the first time from the stems and leaves of Lonicera macranthoides.

[Study on the chemical constituents from the bulbs of Zephyranthes candida].

OBJECTIVE: To study the chemical constituents from the bulbs of Zephyranthes candida. METHODS: The chemical constituents were separated and purified by means of several chromatographies and their structures were elucidated by spectroscopic methods. RESULTS: Six compounds were isolated and identified as trisphaeridine (I), p-hydroxybenzaldehyde (II), sucrose (III), (-)-amarbellisine (IV), lycorine (V), (+)-haemanthamine (VI). CONCLUSION: Compounds I - IV are obtained from this genus for the first time.

Macranthoside B, a hederagenin saponin extracted from Lonicera macranthoides and its anti-tumor activities in vitro and in vivo.

Macranthoside B (MB) is a hederagenin saponin extracted from the flower bud of Lonicera macranthoides. In this study, we defined the anticancer effect of MB both in vitro and in vivo using cell proliferation assays and xenograft tumor growth assays. Our data indicate that MB inhibits the proliferation of various kinds of cancer cells with IC(50) values in the range of 10-20 microM. Moreover, the volume and weight of xenograft tumors in nude mice treated with 5mg/kgMB were decreased remarkably compared to those of the vehicle control group. Furthermore, DAPI staining and flow cytometry analysis with Annexin V/PI double staining revealed that more apoptotic cells were observed following MB treatment. In addition, degradation of PARP (poly-ADP-ribose polymerase), and activation of the caspase cascade for intrinsic pathways were observed. We also found that the expression of Bcl-2 protein decreased and the protein level of Bax increased which leading to an increase of the Bax/Bcl-2 ratio. Our results showed that MB exhibited strong anti-tumor effect and mitochondrion-mediated apoptosis induction involved in it.

[Studies on the chemical constituents of Lonicera macranthoides].

OBJECTIVE: To study the chemical constituents of flower buds of Lonicera macranthoides. METHODS: The 90% EtOH extract of Lonicera macranthoides. was successively partitioned with petroleum ether and ethyl acetete. RESULTS: Repeated column chromatography of the ethyl acetete fraction afforded the following compounds (1-9): ginnol (1), triacontanol (2), ursolic acid (3), beta-sitosterol (4), triacontane (5), palmitic acid (6), beta-daucosterol (7), 3-decyl-3-octyldocosan-1-ol (8), 3-dodecyl-3-nonyldocosan-1-ol (9). All compounds except 4 are isolated from this plant for the first time while compounds 2, 3, 5, 8 and 9 are their first time been isolated from genus Lonicera.

[Studies on chemical constituents of the roots of Angelica pubescens].

OBJECTIVE: To study the chemical constituents of the roots of Angelica pubescens. METHODS: Fresh roots of Angelica pubescens were extracted with EtOH,the chemical constituents in the extract were isolated by column chromatography as macroporous absorption resin,and ODS etc. Their structures were confirmed by spectral analysis (NMR, MS). RESULTS: Seven compounds were isolated and their structures were identified as nodakenetin (I), umbelliferone (II), columbianetin (III), beta-D-glucosyl-columbianetin (IV), columbianin (V), tert. -O-beta-D- glucopyranosyl -(R)-by-akangelicin (VI) and sec. -O-beta-D- glucopyranosyl-(R) -byakangelicin (VII). CONCLUSION: Compound IV, VI and VII are isolated from Angelica pubescens for the first time.