A 1,2,3,4-tetrahydroquinoxaline compound represented by the following formula:In the formula (1), R1 represents substituents such as a halogen, an alkyl, a cycloalkyl, an aryl or a heterocyclic group； p represents 0 to 5； R2 represents substituents such as a halogen, an alkyl, a hydroxyl or an alkoxy group； q represents 0 to 2； R3 represents substituents such as hydrogen, an alkyl, an alkenyl, an alkylcarbonyl or an arylcarbonyl group； R4 and R5 independently represent substituents such as hydrogen, a halogen, an alkyl, an alkenyl, an alkynyl, a cycloalkyl, an aryl or a heterocyclic group； R6 represents substituents such as hydrogen, an alkyl, an alkenyl, an alkynyl, a cycloalkyl, an aryl or a heterocyclic group； A represents an alkylene； R7 represents OR8, NR8R9, SR8, S(O)R8, S(O)2R8； R8 and R9 independently represent substituents such as hydrogen, an alkyl or an alkenyl； and X represents O or S.
