abstract |
(57) [Summary] (Modified) SOLUTION: A calcium metabolism improving agent containing (20S, 22R) -22-methyl-1α, 25-dihydroxyvitamin D 3 of formula 1 as an active ingredient. [Effects] High binding activity for 1α, 25-dihydroxyvitamin D 3 receptor and high safety (20 Provided is a calcium metabolism improving agent containing S, 22R) -22-methyl-1α, 25-dihydroxyvitamin D 3 as an active ingredient. |