| abstract |
Disclosed is a compound of formula (I) [R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , X, and a are as defined herein] or a pharmaceutically acceptable salt thereof Salt. Also disclosed is a pharmaceutical composition comprising a compound of formula (I) or a salt thereof and a bone disorder, cardiovascular disease, cardiovascular complication associated with renal disease, endothelial dysfunction, parathyroid gland It is a method for treating diseases in which regulation of vitamin D receptors is effective, such as hyperfunction, hypocalcemia, immune disorders, left ventricular hypertrophy, proliferative disease, proteinuria, kidney disease, and thrombosis. |