Terpenoids from leaves of Aeschynanthus mengxinensis.
- Author:
Wen-yi KANG
1
;
Xin-yan ZANG
;
Jin-mei WANG
;
Qi-tai XU
Author Information
- Publication Type:Journal Article
- MeSH: Drugs, Chinese Herbal; chemistry; Magnoliopsida; chemistry; Plant Leaves; chemistry; Terpenes; chemistry
- From: China Journal of Chinese Materia Medica 2008;33(17):2118-2121
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo study the chemical constituents from the ethyl acetate portion of an ethanolic extractive of the leaves of Aeschynanthus mengxinensis.
METHODThe column chromatographic techniques were applied to isolate constituents. A combination of IR, ESI-MS, NMR and 2D-NMR spectroscopy was used to identify structures.
RESULTFour compounds were isolated from the ethyl acetate fraction of this plant, and the structure of them have identified as 2alpha, 3beta, 19beta-trihydroxyolean-12-ene-23,28-dioic acid (1), 2alpha, 3beta, 21beta-trihydroxyolean-12-ene-28-oic acid (2), 2alpha, 3beta, 23-trihydroxyurs-12-ene-28-oic acid (3) and stigmast-5 (6), 22 (23)-diene-3beta-ol (4).
CONCLUSIONThe NMR data of compound 1 was completely assigned by 2D-NMR techniques, including HMBC and HMQC. Compounds 1-4 were isolated for the first time from Gesneriaceae.
