1 alpha ,25-dihydroxy-26,27-dimethylcholecalciferol and its use in the treatment of calcium pathobolism

摘要

1 alpha ,25-Dihydroxy-26,27-dimethylcholecalciferol represented by formula: <IMAGE> (I) This compound is prepared by irradiating 26,27-dimethylcholesta-5,7-diene-1 alpha ,3 beta ,25-triol with ultraviolet light, and is useful for the prevention or treatment of calcium pathobolism or osteoporosis.