A bicyclic pyramidine derivative of general formula (I) and pharmaceutically acceptable acid addition salts thereof, which are especially effective in treating hypoxemia caused by deseases of the respiratory system, wherein R¹, R², R³, Y, Z, and m are as defined in the specification.
通式(I)的双环
吡喃啶衍
生物及其药学上可接受的酸加成盐,对治疗呼吸系统疾病引起的低氧血症特别有效,其中R¹、R²、R³、Y、Z和m如说明书中所定义。