(24R,22E)-de-A,B-8β-<(tert-butyldimethylsilyl)oxy>ergost-22-ene

(3beta,5Z,7R,8alpha,22E)-9,10-开环麦角甾-5,10(19),22-三烯-3,7,8-三醇

3β-O-(triisopropylsilyl)-7,8-dihydroxy-7,8-dihydrovitamin D2