A crystalline sterol, C28H43OH, synthesized by yeast from sugars or derived from ergot and converted to vitamin D2 when exposed to ultraviolet radiation.
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- 麦角甾醇结晶甾醇,C28H43OH,由糖中的酵母合成或由麦角提炼而成,当受紫外线照射时可转化成维生素D2