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1α,25-Dihydroxyvitamin D2

1α,25-dihydroxy-2β-(3-hydroxypropoxy)Vitamin D3

[3S-(1Z,3a,5b)]-[2-{3,5-bis-{[(1,1-dimethylethyl)-dimethylsilyl]-oxy}-2-methylenecyclohexylidene}-ethyl]-diphenyl phosphine oxide