A highly crystalline vitamin D derivative represented by general formula (I), and a process for producing a highly pure 22-oxavitamin D derivative by hydrolyzing the above compound, wherein R₁ represents optionally hydroxylated linear or branched C₄-C₉ alkyl, and R₂ and R₃ may be the same or different from each other and each represents acyl.
通式(I)代表的高结晶
维生素 D 衍
生物,以及通过
水解上述化合物生产高纯度 22-氧
维生素 D 衍
生物的工艺,其中 R₁ 代表任选羟基化的直链或支链 C₄-C₉烷基,R₂ 和 R₃ 可以彼此相同或不同,并且各自代表酰基。