acetic acid 2-[6-(1,5-dimethyl-2-oxo-hexyl)-6-hydroxy-10-methoxy-3a,5a-dimethyl-hexadecahydro-cyclopenta[a]cyclopropa[2,3]cyclopenta[1,2-f]naphthalen-7-yloxy]-4,5-bis-triethylsilanyloxy-tetrahydro-pyran-3-yl ester

6β-methoxy-3α,5-cyclo-27-nor-5α-furostane-17α,22α-diol