Isospongiadiol

2α-Hydroxy-4β-(hydroxymethyl)-4,8-dimethyl-18-nor-16-oxa-5α-androsta-13(17),14-dien-3-one

(5α,9α,10β)-2α-Hydroxy-4β-(hydroxymethyl)-4,8β-dimethyl-18-nor-16-oxaandrosta-13(17),14-diene-3-one