Ergocalciferols
Synonyms
Calciferols
D2, Vitamin
Ergocalciferol
Vitamin D 2
Vitamin D2
Derivatives of ERGOSTEROL formed by ULTRAVIOLET RAYS breaking of the C9-C10 bond. They differ from CHOLECALCIFEROL in having a double bond between C22 and C23 and a methyl group at C24.