Patent ID: 8119812

Claim:
A compound represented by the following formula (I), a geometric isomer or a tautomer thereof, or a salt thereof: wherein R 1 is selected from the group consisting of a hydrogen atom, a linear or branched lower alkyl group, a halogen, a hydroxyl group, an amino group that may have a substituent, and a nonaromatic heterocyclic group that may have a substituent; R 2 is a hydrogen atom, or a linear or branched lower alkyl group; R 3 is selected from the group consisting of a linear or branched lower alkyl group, a cycloalkyl group that may have a substituent, an aryl group that may have a substituent, an arylalkyl group that may have a substituent, a nonaromatic heterocyclic group that may have a substituent, a heteroaryl group that may have a substituent, and a fused ring group that may have a substituent; and a wavy line denotes trans, cis or a mixture thereof.