((2R,3R)-2,3-Bis-benzyloxy-6-methyl-hept-4-ynyloxy)-tert-butyl-dimethyl-silane

(23RS,24RS)-24-bromo-23,24-(dibromomethylene)-6β-methoxy-3α,5-cyclo-5α-cholestane

ethyl (23Z)-6β-methoxy-24-(trimethylsilyl)-3α,5-cyclo-5α-cholest-23-en-21-oate

(23Z)-24-bromo-6β-methoxy-3α,5-cyclo-5α-cholest-23-en-21-ol

(23Z)-6β-methoxy-24-(trimethylsilyl)-3α,5-cyclo-5α-cholest-23-en-21-ol