| 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. (05 Mar 2000) |
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| 7-dehydrocholesterol |
a sterol found in the skin; it is the provitamin of cholecalciferol, being converted to that compound upon irradiation by ultraviolet light.
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