期刊
NATURAL PRODUCT RESEARCH
卷 29, 期 7, 页码 644-649出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/14786419.2014.980255
关键词
Rubiaceae; Nauclea officinalis; triterpenoid; pyrocincholic acid
Two new triterpenoids and three 27-nor-triterpenoids were isolated from the stems (with bark) of Nauclea officinalis. Their structures were identified to be 2 beta,3 beta,19 alpha,23-tetrahydroxy-urs-12-en-28-oic acid (1), 2 beta,3 beta,19 alpha,23-tetrahydroxy-urs-12-en-28-O-[beta-d-glucopyranosyl (1-2)-beta-d-glucopyranosyl] ester (2), pyrocincholic acid 3 beta-O-alpha-l-rhamnopyranoside (3), pyrocincholic acid 3 beta-O-alpha-l-rhamnopyranosy1-28-O-beta-d-glucopyranosyl ester (4), pyrocincholic acid 3 beta-O-alpha-l-rhamnopyranosy1-28-O-beta-d-glucopyranosyl-(1-6)-beta-d-glucopyranosyl ester (5) by spectroscopic methods including 1D, 2D NMR and HR-MS analyses. The cytotoxic activity of 1-5 against lung cancer A-549 cells was also investigated.
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