The molecule is a 3beta-sterol having a 5alpha-ergostane skeleton with double bonds at C-6, C-9(11), C-22 and C-25 and a peroxy group between positions 5 and 8. An antineoplastic agent isolated from Okinawan sponge of the genus Axinyssa. It has a role as a metabolite and an antineoplastic agent. It is an organic peroxide, an organic heterotetracyclic compound, a secondary alcohol and a 3beta-sterol. It derives from a hydride of a 5alpha-ergostane.
(1S,2R,5R,6R,10R,13S,15S)-5-[(2R,3E,5S)-5,6-dimethylhepta-3,6-dien-2-yl]-6,10-dimethyl-16,17-dioxapentacyclo[13.2.2.01,9.02,6.010,15]nonadeca-8,18-dien-13-ol