The present invention relates to compounds of formula (I), and pharmaceutically acceptable salts thereof, wherein: R3 is tert-butylmethyl, sec-butyl or tert-butyl; X is CH or N; and R4 is optionally substituted C1-8 alkyl or optionally substituted C3-8 cycloalkyl. The invention further relates to pharmaceutical compositions comprising compounds of formula (I), and the use of such compounds in the treatment of a disease selected from osteoporosis, Paget's disease, Chagas's disease, malaria, gingival diseases, hypercalaemia, metabolic bone disease, diseases involving matrix or cartilage degradation, and bone cancer disorders such as bone metastases and associated pain.
本发明涉及式(I)的化合物及其药学上可接受的盐,其中:R3为叔丁基甲基、仲丁基或叔丁基;X为CH或N;R4为可选取代的C1-8烷基或可选取代的C3-8环烷基。本发明还涉及含有式(I)化合物的制药组合物,以及在治疗从骨质疏松症、帕盖特病、恶性贫血、疟疾、牙龈疾病、高
钙血症、代谢性骨病、涉及基质或软骨降解的疾病以及骨癌性疾病如骨转移和相关疼痛方面使用这些化合物的方法。