Patent ID: 7090961

Claim:
A compound of the following general formula (1), wherein: a) R 1 and R 2 may be the same or different and each represents a hydrogen atom or a linear, branched or cyclic alkyl group having 1 to 8 carbon atoms; b) Y represents a nitrogen atom or an alkylene group having 1 to 4 carbon atoms; c) R 3 represents: i) a linear, branched or cyclic alkyl group having 2 to 8 carbon atoms, an aryl group having 6 to 16 carbon atoms, and may be substituted by an alkyl group having 1 to 4 carbon atoms, a fluorinated alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a fluorinated alkoxy group having 1 to 4 carbon atoms, a nitro group, a cyano group, a fluorine atom, a phenyl group, a substituted phenyl group, an acetyl group or a benzoyloxy group when Y represents an alkylene group having 1 to 4 carbon atoms, or ii) a linear, branched or cyclic alkyl group having 1 to 8 carbon atoms, an aryl group having 6 to 16 carbon atoms, and may be substituted by an alkyl group having 1 to 4 carbon atoms, a fluorinated alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a fluorinated alkoxy group having 1 to 4 carbon atoms, a nitro group, a cyano group, a fluorine atom, a phenyl group, a substituted phenyl group, an acetyl group or a benzoyloxy group when Y represents a nitrogen atom; and d) X − represents a non-nucleophilic counter ion having 1 to 20 carbon atoms.