Patent ID: 8227480

Claim:
A compound represented by the following formula [I] or a salt thereof: wherein the ring X represents a benzene ring or a pyridine ring; R 1 and R 2 are the same or different and represent one or plural groups selected from the group consisting of a hydrogen atom, a substituted or unsubstituted alkyl group and a substituted or unsubstituted cycloalkyl group; R 3 represents one or plural groups selected from the group consisting of a hydrogen atom and a substituted or unsubstituted alkyl group; R 4 and R 5 are the same or different and represent one or plural groups selected from the group consisting of a hydrogen atom and a substituted or unsubstituted alkyl group; R 6 and R 7 are the same or different and represent a group selected from the group consisting of a hydrogen atom and a substituted or unsubstituted alkyl group; R 6 and R 7 may be joined together to form a monocyclic heterocyclic ring; and m, n, p and q are the same or different and represent an integer of 0 to 3, with the proviso that the sum of m and n is an integer of 1 or more and the sum of p and q is an integer of 1 or more, wherein the substituted alkyl group is substituted with one or plural groups selected from the group consisting of a halogen atom, a hydroxyl group, an unsubstituted alkoxy group, an unsubstituted aryl group, a hydroxyimino group and an unsubstituted alkoxyimino group.