(3aR,5R,7aS)-6-iodo-2,2-dimethyl-3a,4,5,7a-tetrahydro-1,3-benzodioxol-5-ol

(3aR,5R,7aS)-6-iodo-2,2-dimethyl-5-[(4-nitrophenyl)carbonyloxy]-3a,4,5,7a-tetrahydro-1,3-benzodioxole

(3aR,4aS,8aS)-2,2-dimethyl-5-[(4-methylphenyl)sulfonyl]-4,4a,5,6,7,8a-hexahydro-3aH-[1,3]dioxolo[4,5-f]indol-7-one

(3aR,4aS,7R,8aS)-2,2-dimethyl-5-[(4-methylphenyl)sulfonyl]-4,4a,5,6,7,8a-hexahydro-3aH-[1,3]dioxolo[4,5-f]indol-7-ol

(3aR,4aS,7R,8aS)-2,2-dimethyl-5-[(4-methylphenyl)sulfonyl]-4,4a,5,6,7,8a-hexahydro-3aH-[1,3]dioxolo[4,5-f]indol-7-yl pivalate