vitamin D 2

vitamin-d-2的词性：
n.（名词）

1. A white crystalline compound, C₂₈H ₄₄O, produced by ultraviolet irradiation of ergosterol. Also called calciferol, ergocalciferol
维生素D2：一种白色晶体化合物，C₂₈H ₄₄O，通过紫外线照射麦角固醇获得 也作 calciferol， ergocalciferol