| abstract |
An amidinonaphthyl derivative having an antiplatelet aggregation effect on the basis of the effect of inhibiting activated blood coagulation factor X, being useful as an antithrombotic agent, etc., and represented by general formula (I) or a pharmaceutically acceptable salt thereof, an intermediate thereof, and a medicinal composition comprising the amidinonaphthyl derivative. In said formula (I), R1 represents hydrogen or -A-W-R4; A represents (a), (b) or -SO¿2?; X represents oxygen or sulfur; W represents a single bond or -NR?5-; R4¿ represents hydroxy, lower alkoxy, etc.; R5 represents hydrogen, carbamoyl, lower alkoxycarbamoyl, etc.; R2 represents lower alkyl; R3 represents hydrogen, halogeno, carboxy, etc.; B represents lower alkylene or carbonyl; and n is 0 or 1. |