Problems to be solved are to provide novel low-molecular compounds which exhibit calcium receptor antagonist activity, and which are highly safe and orally administrable. Means for solving the problems are the compounds having the Formula (I) or pharmaceutically acceptable salts thereof:
[in the formula, each substituent is defined as follows. A: a single bond or the like; D: a single bond or the like; R2a and R2b: the same or different from each other, a hydrogen atom, a halogen atom, or the like; R3a and R3b: the same or different from each other, a hydrogen atom, a halogen atom, or the like; R4 and R5: the same or different from each other, a hydrogen atom, a halogen atom, or the like; R6: a methyl group, an ethyl group, or the like; m: an integer of 0 to 6, or the like; Z: a carboxy group or the like]
需要解决的问题是提供新型低分子化合物,这些化合物具有
钙受体拮抗剂活性,并且高度安全,可口服。解决这些问题的方法是具有式(I)的化合物或其药学上可接受的盐:
[式中,各取代基定义如下。A:单键或类似物; D:单键或类似物; R2a 和 R2b:彼此相同或不同,氢原子、卤素原子或类似物; R3a 和 R3b:彼此相同或不同,氢原子、卤素原子或类似物; R4 和 R5:氢原子、卤素原子或类似物;R6:甲基、乙基或类似物;m:0 至 6 的整数或类似物;Z:羧基或类似物]。