Patent ID: 8461175

Claim:
A compound of formula (I): in which: R 1 represents a phenyl group which is optionally substituted by one or more halogen atoms; R 2 represents: a hydrogen or halogen atom or a cyano group; a group —C(═O)Y in which Y represents a hydrogen atom or a group —NH 2 or —OR a ; a group —C(═S)NH 2 ; a group —C(═NH)NH—OH; a group —CH 2 OH or —CH 2 F; a group —CH═N—OH; a group —CH═CH 2 or —C≡C—R a ; a group where R a represents a hydrogen atom or a (C 1 -C 4 )alkyl group; R 3 represents a hydrogen atom or a (C 1 -C 4 )alkyl group; R 4 represents an —NH 2 , (C 1 -C 4 )alkyl, (C 1 -C 4 )fluoroalkyl or (C 3 -C 7 )cycloalkyl group.