The present invention provides 4-amino-5-cyanopyrimidine derivatives of the formula: wherein R
1
, R
2
and R
3
are defined herein, or pharmaceutically acceptable salts thereof, having a safe and potent adenosine A2a receptor agonistic activity; and also provides an adenosine A2a receptor agonist, an intraocular pressure reducing agent, or a medicine for treating glaucoma, etc., which comprises the compound as an active ingredient.
本发明提供了式子如下的4-
氨基-5-
氰基嘧啶衍
生物:其中R1、R2和R3如本文所定义,或其药学上可接受的盐,具有安全有效的
腺苷A2a受体激动活性;同时,本发明还提供了一种
腺苷A2a受体激动剂、降低眼内压的药剂或治疗青光眼的药物等,其包含该化合物作为活性成分。