| 摘要 |
PROBLEM TO BE SOLVED: To provide a compound or a pharmacologically acceptable salt thereof that has carboxypeptidase B inhibitory activity and is useful for therapy and/or prophylaxis of thrombotic diseases. SOLUTION: The objective compound is represented by the following general formula I [R1 is H, an alkyl, a substituted alkyl and the like; R2 and R3 are each H, an alkyl, a substituted alkyl, an alkoxy and the like; X is -CH2-, or -O-; A represents the following group II (R7 and R8 are each H, an alkyl, an acyl, an alkoxycarbonyl and the like; R9 and R10 are each H, a halogen, hydroxyl, phenyl, an alkyl and the like)].
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