Ergocalciferol

**Semantic type:** Vitamin

**Definition:** Vitamin D2, a fat-soluble vitamin important for many biochemical processes including the absorption and metabolism of calcium and phosphorus. In vivo, ergocalciferol is formed after sun (ultraviolet) irradiation of plant-derived ergosterol, another form of vitamin D. Ergocalciferol is the form of vitamin D usually found in vitamin supplements. (NCI04)

**Synonyms:** - (5Z,7E,22E)-(3S)-9,10-seco-5,7,10(19),22-ergostatetraen-3-ol - 9,10-Secoergosta-5,7,10(19),22-tetraen-3-beta-ol - Deltalin - Drisdol - ERGOCALCIFEROL - Vitamin D - Vitamin D - Vitamin D2 - Vitamin D2 - ergocalciferol - vitamin D2