(1S,3R,5Z,7E,20R)-20-(3-(2-Hydroxypropan-2-yl)benzyloxymethyl)-9,10-secopregna-5,7,10(19)-triene-1alpha,3beta-diol 302904-82-1 Atocalcitol Atocalcitol [INN] Atocalcitolum [INN-Latin]