Provision of a novel amidine derivative or a pharmaceutically acceptable salt thereof having an activated blood coagulation factor X-inhibitory activity. A compound represented by the formula (I)
wherein each symbol is as defined above, or a pharmaceutically acceptable salt thereof.
[EN] FIVE-MEMBERED HETEROCYCLO-PYRIMIDINE COMPOUND, PHARMACEUTICAL COMPOSITION AND USE THEREOF<br/>[FR] COMPOSÉ D'HÉTÉROCYCLO-PYRIMIDINE À CINQ CHAÎNONS, COMPOSITION PHARMACEUTIQUE ET UTILISATION ASSOCIÉE<br/>[ZH] 五元杂环并嘧啶类化合物、药物组合物及用途