Patent ID: 7030138

Claim:
A compound of a formula (1), or a pharmacologically acceptable salt or prodrug thereof: wherein R 1 represents a hydrogen atom, a halogen atom, an alkyl group having from 1 to 6 carbon atoms or a hydroxyl group; R 2 represents a hydrogen atom or a halogen atom; R 3 represents an alkoxycarbonylalkylsulfonyl group having from 3 to 13 carbon atoms or a carboxyalkylsulfonyl group having from 2 to 7 carbon atoms; R 4 and R 5 are the same or different and each of R 4 and R 5 represents a hydrogen atom, a halogen atom, an unsubstituted alkyl group having from 1 to 6 carbon atoms, an alkyl group having from 1 to 6 carbon atoms substituted with a halogen atom, an alkoxy group having from 1 to 6 carbon atoms, a carboxyl group, an alkoxycarbonyl group having from 2 to 7 carbon atoms, a carbamoyl group, a monoalkylcarbamoyl group having from 2 to 7 carbon atoms or a dialkylcarbamoyl group having from 3 to 13 carbon atoms; R 6 represents a hydrogen atom, an unsubstituted alkyl group having from 1 to 6 carbon atoms, a cycloalkyl group having from 3 to 8 carbon atoms, an aralkyl group having from 7 to 16 carbon atoms, an alkyl group having from 1 to 6 carbon atoms substituted with a heterocycle, a carboxyalkyl group having from 2 to 7 carbon atoms, an alkoxycarbonylalkyl group having from 3 to 13 carbon atoms, an aliphatic acyl group having from 2 to 7 carbon atoms, an aromatic acyl group having from 7 to 11 carbon atoms, a carbamoyl group, an alkylsulfonyl group having from 1 to 6 carbon atoms, an aryl group having from 6 to 10 carbon atoms, a heterocycle, a formimidoyl group, a 1-iminoalkyl group having from 3 to 7 carbon atoms, an N-alkylformimidoyl group having from 2 to 7 carbon atoms or an iminoarylmethyl group having from 7 to 11 carbon atoms; each of R 7 and R 8 represents a hydrogen atom or an alkyl group having from 1 to 6 carbon atoms; or R 6 and R 7 taken together or R 7 and R 8 taken together form an alkylene group having from 2 to 5 carbon atoms; and n represents 0, 1 or 2.