2-[(R)-2-Benzenesulfonyl-4-((1aR,3aR,3bS,5aR,6R,8aS,8bS,10R,10aR)-10-ethoxy-3a,5a-dimethyl-hexadecahydro-cyclopenta[a]cyclopropa[2,3]cyclopenta[1,2-f]naphthalen-6-yl)-pentyl]-2-methyl-[1,3]dioxolane

(25R)-3β,26-O-bis-p-nitrobenzoyl-16β,26-dihydroxycholesterol

(25R)-3β,26-O-bis-p-nitrobenzoyl-16-oxo-26-hydroxycholesterol