Abstract: The present invention provides a compound which enhances the production of erythropoietin. The present invention provides a compound represented by the formula (1) wherein R1: an aromatic hydrocarbon ring group or an aromatic heterocyclic group; R2: a hydrogen atom, an alkyl group, or a heterocycloalkyl group; R3: a hydrogen atom or an alkyl group; A: a hydrogen atom or a hydroxy group; L: —NHCO— or —OCH2—; and X: a nitrogen atom or ?CH—.

Abstract: The present invention provides a compound which enhances the production of erythropoietin. The present invention provides a compound represented by the formula (1) wherein R1: an aromatic hydrocarbon ring group or an aromatic heterocyclic group; R2: a hydrogen atom, an alkyl group, or a heterocycloalkyl group; R3: a hydrogen atom or an alkyl group; A: a hydrogen atom or a hydroxy group; L: —NHCO— or —OCH2—; and X: a nitrogen atom or ?CH—.

Abstract: A compound of the general formula (I): [wherein, R1 represents a halogen atom, or the like, R2 represents a hydrogen atom, or the like, R3 and R4, each independently, represent a hydrogen atom, a C1-4 alkyl group, or the like, R5 represents a hydrogen atom, a halogen atom, or the like, R6 represents a hydrogen atom, a halogen atom, or the like, R7 and R8, each independently, represent a hydrogen atom, a halogen atom, or the like, R9 and R10, each independently, represent a hydrogen atom, a C1-4 alkyl group, R11 and R12, each independently, represent a hydrogen atom, a C1-4 alkyl group, or the like, X represents an oxygen atom, a group —CH2—, or the like, Y represents a nitrogen atom, a group ?CH—, or the like, and Z represents a nitrogen atom, or the like] or a pharmacologically acceptable salt thereof, which has an excellent suppressive action on platelet aggregation, and is useful for prevention and/or treatment of thromboembolism.

Abstract: A compound of the general formula (I): [wherein, R1 represents a halogen atom, or the like, R2 represents a hydrogen atom, or the like, R3 and R4, each independently, represent a hydrogen atom, a C1-4 alkyl group, or the like, R5 represents a hydrogen atom, a halogen atom, or the like, R6 represents a hydrogen atom, a halogen atom, or the like, R7 and R8, each independently, represent a hydrogen atom, a halogen atom, or the like, R9 and R10, each independently, represent a hydrogen atom, a C1-4 alkyl group, R11 and R12, each independently, represent a hydrogen atom, a C1-4 alkyl group, or the like, X represents an oxygen atom, a group —CH2—, or the like, Y represents a nitrogen atom, a group ?CH—, or the like, and Z represents a nitrogen atom, or the like] or a pharmacologically acceptable salt thereof, which has an excellent suppressive action on platelet aggregation, and is useful for prevention and/or treatment of thromboembolism.