OBJECTIVETo study the chemical constituents from the bark of Mitragyna rotundifolia.

METHODColumn chromatographic techniques were applied to isolate constituents. A combination of IR, MS and NMR spectroscopy was used to identify structures of constituents.

RESULTSix compounds were isolated from the n-BuOH fraction and their structures were elucidated as quinovic acid-3-O-beta-D-6-deoxy-glucopyranoside, 28-O-beta-D-glucopyranosyl ester (1), quinovic acid-27-O-alpha-L-rhamnopyranosyl ester (2), quinovic acid-3-O-alpha-L-rhamnopyranoside (3), qunovic acid-27-O-beta-D-glucopyranosyl ester (4), quovic acid-3-O-beta-D-6-deoxy-glucopyranoside (5), qunovic acid-27-O-beta-6-deoxy-D-glucopyranosyl ester (6).

CONCLUSIONCompounds 1 - 6 were isolated for the first time from the plant. Compounds 1 - 4 and 6 were isolated for the first time form the genus.

Mitragyna ; chemistry ; Plant Bark ; chemistry ; Plants, Medicinal ; chemistry ; Saponins ; chemistry ; isolation & purification ; Triterpenes ; chemistry ; isolation & purification

OBJECTIVETo study the triterpenoid saponins in Hemsleya chensnsis.

METHODThe chemical constituents were isolated and purified by various chromatographic methods and their structures were elucidated on the basis of spectral analysis.

RESULTSeven known triterpenoid saponins were isolated from the root of H. chensnsis and were identified as 3-O-beta-D-glucuropyranosyl-oleanol-icacid (1), 3-O-beta-D-glucopyra-noside-oleanolicacid-28-O-beta-D-glucopyranoside (2), 3-O-(6'-methylester)-beta-D-glucuropyranosyl olea- nolic acid-28-O-alpha-L-arabinopyranoside (3), 3-O-(6'-methylester)-beta-D- glucuropyranosyl- oleanolic acid-28-O-beta-D-mannupyranoside (4), 3-O-(6'-ethyl ester)-beta-D-glucuropyranosyl oleanolic acid-28-O-beta-D- glucopyranoside (5), 3-O-alpha-L-arabinopyranoside-(1-->3) -beta-D-glucuropyranosyl- oleanolic acid-28-O-beta-D-glucopyranoside (6), 3-O-beta-D-glucu-ropyranosyl-oleanolic acid-28-O-beta-D-glucopyra-noside-(1-->6)-beta-D-glucopyranoside (7).

CONCLUSIONCompounds 1-7 were isolated from this plant for the first time.

Cucurbitaceae ; chemistry ; Drugs, Chinese Herbal ; pharmacology ; Mitragyna ; chemistry ; Molecular Structure ; Plant Extracts ; pharmacology ; Plant Roots ; chemistry ; Saponins ; chemistry ; isolation & purification

OBJECTIVETo study the constituents of Mitragyna inermis that have an anti-tumor activity on Bel-7402 of hepatic carcinoma.

METHODThe compounds were isolated by column chromatography on silica gel, ODS, Sephadex LH-20 separately and their structures were elucidated by chemical and spectral technology.

RESULTThree quinovic acid glycosides, quinovic acid 3 beta-beta-D-glucopyranosyl-(1-->4)-alpha-L-rhamnopyranosyl-28-O-beta- D-glucopyranoside(I), quinovic acid 3 beta-O-beta-D-quinovopyranoside(II), quinovic acid 3 beta-O-beta-D-glucopyranoside(III), were obtained.

CONCLUSIONI, II were isolated from Mitragyna for the first time.

Antineoplastic Agents, Phytogenic ; pharmacology ; Carcinoma, Hepatocellular ; pathology ; Humans ; Liver Neoplasms ; pathology ; Mitragyna ; chemistry ; Plant Bark ; chemistry ; Plants, Medicinal ; chemistry ; Saponins ; chemistry ; isolation & purification ; pharmacology ; Tumor Cells, Cultured ; drug effects

AIM: To study the chemical constituents and bioactivity of the stem bark of Mitragyna diversifolia. METHOD: Compounds were isolated by various chromatographic methods. Their structures were elucidated on the basis of spectroscopic techniques (IR, UV, MS, and NMR), and they were evaluated for their cytotoxic activities by the MTT method. RESULTS: Eight triterpenes were isolated and identified as 3α, 6β, 19α-trihydroxy-urs-12-en-28-oic acid (1), 3β, 6β, 19α-trihydroxy-urs-12-en-28-oic acid (2), 3-oxo-6β-19α-dihydroxy-urs-12-en-28-oic acid (3), 3β, 6β, 19α-trihydroxy-urs-12-en-24, 28-dioic acid 24-methyl ester (4), 3β, 6β, 19α, 24-tetrahydroxy-urs-12-en-28-oic acid (5), rotundic acid (6), 23-nor-24-exomethylene- 3β, 6β, 19α-trihydroxy-urs-12-en-28-oic acid (7), and pololic acid (8), respectively. All of the isolates were tested against two human tumor cell lines, MCF-7 (breast) and HT-29 (colon). CONCLUSION Compound 1 was a new triterpene. Compounds 5 - 7 exhibited potent inhibitory effects on the growth of MCF-7 and HT-29 cells, and the others showed no cytotoxicity.
Antineoplastic Agents, Phytogenic ; chemistry ; isolation & purification ; pharmacology ; therapeutic use ; HT29 Cells ; Humans ; MCF-7 Cells ; Mitragyna ; chemistry ; Molecular Structure ; Neoplasms ; drug therapy ; Phytotherapy ; Plant Bark ; chemistry ; Plant Extracts ; chemistry ; pharmacology ; therapeutic use ; Plant Stems ; chemistry ; Triterpenes ; chemistry ; isolation & purification ; pharmacology ; therapeutic use