The present invention is directed to novel pyrido[4,3-d]pyrimidin-4(3H)-one derivatives and pharmaceutically acceptable salts thereof of structural formula I
wherein the variables R
1
, R
2
, R
3
, R
4
and R
5
are as described herein. Also provided are pharmaceutical compositions comprising the compounds of formula I as well as methods of treatment employing compounds of formula I to treat a disease or disorder characterized by abnormal bone or mineral homeostasis such as hypoparathyroidism, osteoporosis, osteopenia, periodontal disease, Paget's disease, bone fracture, osteoarthritis, rheumatoid arthritis, and humoral hypercalcemia of malignancy.
本发明涉及新型的
吡啶[4,3-d]
嘧啶-4(3H)-酮衍
生物及其药用可接受的盐,其结构公式为I,其中变量R1、R2、R3、R4和R5如本文所述。还提供了包含公式I化合物的药物组合物,以及使用公式I化合物治疗由异常骨骼或矿物质稳态特征性疾病或失调的方法,例如低甲状旁腺功能症、骨质疏松症、骨量减少、牙周病、佩吉特病、骨折、骨关节炎、类风湿性关节炎和恶性体液性高
钙血症。