(20S)-2-METHYLENE-19-NOR-22-DIMETHYL-1.ALPHA.,25-DIHYDROXYVITAMIN D3 AND (20R)-2-METHYLENE-19-NOR-22-DIMETHYL-1.ALPHA.,25-HYDROXYVITAMIN D3

摘要

Compounds of formula I are provided where X1, X2 and X3 are independently selected from H or hydroxy protecting groups. Such compounds may be used in preparing pharmaceutical compositions and are useful in treating a variety of biological conditions.