The compounds of Formula (I),
wherein R1, R2, R21, R22, R23, R24, Y and R3 have the meanings as given in the description, the salts thereof, the stereoisomers of the compounds and the salts thereof are effective inhibitors of the type 5 phosphodiesterase and are useful for treating or preventing idiopathic pulmonary lung fibrosis.
公式(I)的化合物,其中R1、R2、R21、
R22、R23、R24、Y和R3的含义如说明书所述,其盐、化合物和盐的立体异构体是5型
磷酸二酯酶的有效
抑制剂,并且可用于治疗或预防特发性肺纤维化。