Compounds of formula (I):
wherein A, R1, R2, X, m, and n are as defined in the specification, are selective M3 receptor antagonists and may be used in the treatment of, inter alia, a respiratory disease such as asthma and COPD.
式(I)的化合物:其中A,R1,R2,X,m和n如规范所定义,是选择性M3受体拮抗剂,可用于治疗呼吸系统疾病,例如哮喘和慢性阻塞性肺疾病(
COPD)。