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NCI Drug Dictionary

  

ergocalciferol 
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. Check for active clinical trials or closed clinical trials using this agent. (NCI Thesaurus)
Synonym:vitamin D2
Chemical structure:9,10-secoergosta-5,7,10(19),22-tetraen-3-beta-ol