Patent ID: 7087606

Claim:
A phenylpyridazine compound having the formula (1): wherein: R 1 is a substituted or unsubstituted alkyl group, or a substituted or unsubstituted alkenyl group; R 2 and R 3 each independently represents a hydrogen atom or an alkyl, hydroxyalkyl, dihydroxyalkyl or alkynyl group, or R 2 and R 3 are fused together with the adjacent nitrogen atom to form a substituted or unsubstituted, saturated heterocyclic group having as heterocyclic ring atoms only C and N or having as heterocyclic ring atoms only C, N and O; X, Y and Z each independently represents a hydrogen or halogen atom, a substituted or unsubstituted alkyl, alkoxy, alkylthio, alkylsulfinyl or alkylsulfonyl group, or a substituted or unsubstituted aryl group; and n stands for a number of from 1 to 5; with the proviso that R 2 and R 3 are not hydrogen atoms or the same C 1 –C 3 alkyl groups at the same time when R 1 is a benzyl group or a C 1 –C 3 alkyl group; or a salt thereof.