supported by National Natural Science Foundation of China(No.30730109);Shandong Provincial Foundation for Scientific Research(No.2006GG1102023).
Microbial transformation of diosgenin(1) by Syncephalastrum racemosum yielded five new polar metabolites,which wereidentified as(25R)-spirost-5-en-3β,7α,9α-triol-12-one(2),(25R)-spirost-5-en-3β,9α,12α-triol-7-on...