Patent ID: 7763617

Claim:
A pyrazolopyridine-4-yl pyridazinone compound represented by the following formula (1): wherein: R 1 is a hydrogen atom, a halogen atom, a lower alkyl group having 1 to 4 carbon atoms, a substituted or unsubstituted lower alkoxy group having 1 to 4 carbon atoms, a cyclopropylmethyloxy group, a lower alkylthio group having 1 to 4 carbon atoms, a lower alkylsulfinyl group having 1 to 4 carbon atoms, a lower alkylsulfonyl group having 1 to 4 carbon atoms, a substituted or unsubstituted lower alkylamino group having 1 to 4 carbon atoms, a phenylamino group, an aromatic or saturated heterocyclic ring that may contain 1 or 2 heteroatoms, a lower alkanoyl group having 1 to 4 carbon atoms, an alkanoylamino group having 1 to 4 carbon atoms, a substituted or unsubstituted phenyl group, a carbamoyl group, a cyano group, a lower alkoxycarbonyl group having 1 to 4 carbon atoms, or a carboxyl group; R 2 is a hydrogen atom, a substituted or unsubstituted lower alkyl group having 1 to 4 carbon atoms, a cycloalkyl group having 3 to 8 carbon atoms, a lower alkenyl group having 2 to 4 carbon atoms, a lower alkanoyl group having 1 to 4 carbon atoms, or a lower alkylthio group having 1 to 4 carbon atoms; R 3 is a hydrogen atom, a halogen atom, a carboxyl group, a lower alkoxycarbonyl group having 1 to 4 carbon atoms, or a hydroxyl group; R 4 and R 5 are each independently a hydrogen atom or a lower alkyl group having 1 to 4 carbon atoms; R 6 is a hydrogen atom, or R 7 —(CH 2 ) m — (wherein R 7 is a cycloalkyl group having 3 to 8 carbon atoms, a hydroxyl group, or an aromatic or saturated heterocyclic ring that may contain 1 or 2 heteroatoms, and m is an integer of 1 or 2); and -- is a single or double bond, an optical isomer thereof or a pharmaceutically acceptable salt thereof or a hydrate thereof.