Vitamin D [Chemical/Ingredient] Cholecalciferol [Chemical/Ingredient] Derivative of 7-dehydroxycholesterol formed by ULTRAVIOLET RAYS breaking of the C9-C10 bond. It differs from ERGOCALCIFEROL in having a single bond between C22 and C23 and lacking a methyl group at C24. 2418 Vitamin D3 Cholecalciferol D002762 C0008318 Calciol Cholecalciferol M0004229 Cholecalciferol Vitamin D 3 N0000006996 C24342 9,10-Secocholesta-5,7,10(19)-trien-3-ol, (3beta,5Z,7E)- (3 beta,5Z,7E)-9,10-Secocholesta-5,7,10(19)-trien-3-ol Sterols [Chemical/Ingredient] Cholestenes [Chemical/Ingredient]