Compounds of formula (I) ##STR1## as defined by the specification. The compounds are useful in the treatment or prevention of vitamin D dependent disorders, particularly psoriasis, basal cell carcinomas, disorders of keratinization and keratosis, leukemia, osteoporosis, hyperparathyroidism accompanying renal failure, transplant rejection and graft vs. host disease.
式(I)的化合物##STR1##如规范所定义。这些化合物可用于治疗或预防
维生素D依赖性疾病,特别是
银屑病、基底细胞癌、角化和角化症的疾病、白血病、骨质疏松症、伴随肾衰竭的甲状旁腺功能亢进、移植排斥和移植物抗宿主病。