Patent ID: 6936602

Claim:
A compound of the formula (I): wherein R 1 is a 5- to 6-membered aromatic ring which has a group of the formula: R-Z 1 -X-Z 2 - wherein R is a hydrogen atom or a substituted or unsubstituted hydrocarbon group, X is a substituted or unsubstituted alkylene chain, and Z 1 and Z 2 are respectively hetero-atoms, and which may have a further substituent, the group R may bind to the 5- to 6-membered aromatic ring to form a ring, Y is a substituted or unsubstituted imino group, R 2 and R 3 are respectively a substituted or unsubstituted aliphatic hydrocarbon group or a substituted or unsubstituted alicyclic heterocyclic group; or a salt thereof.