The molecule is a 17-hydroxy steroid and a terminal acetylenic compound. It has a role as a xenoestrogen. It derives from a 17beta-estradiol.
(8R,9S,13S,14S,17R)-3-cyclopentyloxy-17-ethynyl-13-methyl-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthren-17-ol