Patent ID: 8148421

Claim:
A compound represented by the following general formula (I), a salt thereof, or a hydrate or solvate thereof: wherein represents a single bond, or a double bond; R 1 represents hydrogen atom, or a C 1-6 alkyl group; R 2 is a hydrogen atom; R 3 is a hydrogen atom, or a C 1-6 alkyl group; both R 4 and R 5 are hydrogen atoms, or in >C(R 6 ) C(R 5 )(R 4 )— is a double bond, or R 4 is a hydrogen atom, and R 5 is a hydroxy group, or a halogen atom; R 6 is hydrogen atom, or cyano group, provided that when in >C(R 6 ) C(R 5 )(R 4 )— represents a double bond, R 4 and R 6 do not exist; R 7 is one or two of the same or different substituents on the benzene ring selected from the group consisting of hydrogen atom, a halogen atom, nitro group, and a C 1-6 alkoxyl group; A is a 5-membered or 6-membered non-aromatic heterocyclic ring containing one sulfur atom (the sulfur atom may form oxide); W is oxo group, two hydrogen atoms, two fluorine atoms, or a combination of hydrogen atom and hydroxy group; and X represents oxygen atom, or sulfur atom.