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Antiproliferative ent-kaurane diterpenoids isolated from the roots of Zea mays L
Andong Wang1, Yanhua Fan2, Qing Ouyang3
1School of Traditional Chinese Medicine, Shenyang Pharmaceutical University, Shenyang 110016, China; Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, China.
Abstract:
Four new ent-kaurane diterpenoid maizediterpenes A-D (1-4), along with fourteen known compounds were isolated from the roots of Zea mays (maize). Compounds 7, 15, 16 were isolated from this genus for the first time. The planar structures of the new compounds were determined by extensive analysis of their NMR and HR-ESI-MS spectra, and the absolute configurations were established on the basis of specific rotation in association with calculated ECD spectra. Compounds 2, 6 and 18 showed significant antiproliferative effects against five human cancer cell lines (A549, MDA-MB-231, SK-Hep-1, SNU638, HCT116) with IC50 values ranging from 1.99 ± 0.41 μM to 15.18 ± 1.17 μM.
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