Patent ID: 7192969

Claim:
A compound which is represented by the following general formula (I): wherein A is a bridged single nitrogen-containing ring having: (i) a formula (a 1 ): wherein k signifies 0, 1 or 2; R 21 and R 31 signify, independently of each other, a lower alkyl; and X − signifies an anion; or (ii) a formula (a p4): in which k signifies 0, 1 or 2; R 20 signifies hydrogen or a lower alkyl optionally having substituent(s) selected from the group consisting of phenyl and cycloalkyl; Ar is phenyl optionally having substituent(s) selected from the group consisting of halogen, lower alkyl, lower alkenyl and lower alkoxy; and R 1 is 3,3-difluorocyclopentyl; or a pharmaceutically acceptable salt thereof.