发明授权
EP1043324B1 PURINE DERIVATIVES AND MEDICINE CONTAINING THE SAME AS THE ACTIVE INGREDIENT 有权
嘌呤衍生物和药物,它们作为活性成分配合

PURINE DERIVATIVES AND MEDICINE CONTAINING THE SAME AS THE ACTIVE INGREDIENT
摘要:
Purine derivatives represented by general formula (I) or salts thereof, useful as the active ingredient of medicines such as antasthmatic, wherein R1 represents C¿1?-C4 alkyl or difluoromethyl; R?2¿ represents tetrahydrofuranyl, C¿1?-C7 alkyl, etc.; X represents hydrogen, halogeno or nitro; and A represents a group represented by general formula (II) or (III), wherein R?3¿ represents hydrogen, halogeno, etc.; and R?4 and R5¿ represent each hydrogen, halogeno, C¿1?-C4 alkyl, C1-C4 alkoxy, etc.
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