英文别名9,10-Secocholesta-5,10(19)-dien-3-ol, 7,8-epoxy-, (3β,5Z,7R,8α)- (9CI); Cholecalciferol Impurity 19 (7,8-Epoxy-vitamin D3); (S,Z)-3-(((1R,3aR,3'R,4R,7aR)-7a-Methyl-1-((R)-6-methylheptan-2-yl)octahydrospiro[indene-4,2'-oxiran]-3'-yl)methylene)-4-methylenecyclohexan-1-ol; Vitamin D3 Impurity 13; Vitamin D3 Impurity 
