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Provitamin d3

From Biology-Online Dictionary | Biology-Online Dictionary
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provitamin D3 --> 7-dehydrocholesterol

Cholesta-5,7-dien-3b-ol;a zoosterol in skin and other animal tissues that upon activation by ultraviolet light becomes antirachitic and is then referred to as cholecalciferol (vitamin D3).

Synonym: provitamin D3.