Cholecalciferol

**Definition:** 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.

**Tree numbers:** - D04.210.500.247.222.159 - D04.210.500.247.808.146 - D04.210.500.812.768.196 - D10.570.938.146

**Synonyms:** - Vitamin D 3 - Vitamin D3 - (3 beta,5Z,7E)-9,10-Secocholesta-5,7,10(19)-trien-3-ol - Calciol