Cm. Zeng et al., BIEMNASTEROL, A NEW CYTOTOXIC STEROL WITH THE RARE 22,25-DIENE SIDE-CHAIN, ISOLATED FROM THE MARINE SPONGE BIEMNA SP, Journal of natural products, 56(11), 1993, pp. 2016-2018
Biemnasterol [2], a new sterol with a 22,25-diene side chain possessin
g cytotoxic activity, has been isolated from the Okinawan marine spong
e Biemna sp. and the structure elucidated on the basis of spectroscopi
c data and chemical means.