Hua Yan, Liu Hai-Yang, Ni Wei, Chen Chang-Xiang, Lu Yang, Wang Cheng, Zheng Qi-Tai
State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, Yunnan, People's Republic of China.
J Nat Prod. 2003 Jun;66(6):898-900. doi: 10.1021/np020411o.
Four new 5alpha-steroidal glycosides with an unusual framework, funingenosides A (1), B (2), C (3), and D (4), were isolated from the roots of Parepigynum funingense. Their structures were elucidated on the basis of 1D and 2D NMR techniques. The structure and relative stereochemistry of compound 1 were demonstrated by X-ray crystallographic analysis.
