Synonyms: 19-Nor-9,10-secoergosta-5,7,22-triene-1,3,25-triol,(1a,3b,7E,22E)- (9CI);19-Nor-1,25-dihydroxyvitamin D2;1a,25-Dihydroxy-19-nor-vitamin D2;1,3-Cyclohexanediol,5-[(2E)-2-[(1R,3aS,7aR)-octahydro-1-[(1R,2E,4S)-5-hydroxy-1,4,5-trimethyl-2-hexen-1-yl]-7a-methyl-4H-inden-4-ylidene]ethylidene]-,(1R,3R,5Z)-;Zemplar;