Zeng C M, Ishibashi M, Kobayashi J
Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan.
J Nat Prod. 1993 Nov;56(11):2016-8. doi: 10.1021/np50101a027.
Biemnasterol [2], a new sterol with a 22,25-diene side chain possessing cytotoxic activity, has been isolated from the Okinawan marine sponge Biemna sp. and the structure elucidated on the basis of spectroscopic data and chemical means.