Patent ID: 6916837

Claim:
An amidino derivative represented by the following general formula (I): where X represents C 1-6 alkyl, a halogen atom, —NH 2 or a group represented by the following formula: where R 1 represents optionally substituted C 1-6 alkyl, optionally substituted C 1-6 alkoxy, optionally substituted C 3-8 cycloalkyl, optionally substituted C 6-14 aryl, optionally substituted C 7-20 aralkyl, an optionally substituted 5- to 14-membered aromatic heterocyclic group or a group represented by the following formula: where R 4 represents hydrogen atom, C 1-6 alkyl or optionally substituted C 2-7 acyl), R 2 represents hydrogen atom or C 1-6 alkyl, and X 2 represents —CO—, —SO 2 —, —NH—CO— or a single bond, R 3 represents hydrogen atom, hydroxyl, C 2-7 acyl or C 2-7 alkoxycarbonyl, Y represents a group of the formula —Ar 2 —CO 2 R 5 (where Ar 2 represents optionally substituted C 6-14 aryl, an optionally substituted 5- to 14-membered aromatic heterocyclic group or a single bond and R 5 represents hydrogen atom or C 1-6 alkyl), and Ar 1 represents 2,6-naphthylene, 1,4-phenylene, 1,3-phenylene, a group represented by the following formula: or a group represented by the following formula: (where the ethyl end is linked to oxygen and the phenyl end is linked to amidine carbon); or a pharmacologically acceptable salt or solvate thereof.