Patent ID: 7855222

Claim:
A method for treating glaucoma comprising administering to a patient in need thereof a pharmaceutically effective amount of a compound represented by the following formula [I] or a pharmaceutically acceptable salt thereof: wherein the ring X is a benzene ring or a pyridine ring; R 1 and R 2 are the same or different and are a hydrogen atom or an alkyl group; or R 1 and R 2 are bonded together to form an unsubstituted cycloalkane ring; R 3 is a hydrogen atom, a substituted alkyl group, an unsubstituted alkenyl group, a carboxyl group or an ester or an amide thereof, an amino group or a cyano group, wherein the substituted alkyl group is an alkyl group substituted with one or more groups selected from the group consisting of a hydroxyl group and a hydroxyimino group; R 4 is a hydrogen atom, a hydroxyl group, a substituted or unsubstituted alkoxy group, an unsubstituted alkenyloxy group, an unsubstituted cycloalkyloxy group, a substituted or unsubstituted alkyl group, an unsubstituted alkenyl group, an unsubstituted cycloalkyl group, an amino group, a substituted or unsubstituted alkylamino group, a nitro group, a cyano group or a monocyclic heterocycle group, wherein the substituted alkoxy group is an alkoxy group substituted with one or more groups selected from the group consisting of a halogen atom and a cycloalkyl group, the substituted alkyl group is an alkyl group substituted with one or more hydroxyl groups and the substituted alkylamino group is an alkylamino group substituted with one or more aryl groups; and R 5 is a halogen atom or a hydrogen atom.