Fei Wang a,b, Fu-Cai Ren b, Ji-Kai Liu a,*
b BioBioPha Co. Ltd., 132 Lanhei Road, Kunming 650204, China
Abstract
2,3-Secofernane triterpenoids, alstonic acids A (1) and B (2), were isolated from the leaves of Alstonia scholaris together with an indole alkaloid, N1-methoxymethyl picrinine (3). Their structures were established from MS and NMR spectroscopic analyses and confirmed by single crystal X-ray diffraction analysis.
文章链接:https://www.sciencedirect.com/science/article/pii/S0031942209001009