Patent ID: 8013008

Claim:
A compound represented by the formula (I) wherein R 1 is a hydrogen atom or alkyl optionally having substituent(s); R 2 is a hydrogen atom, a halogen atom, alkyl optionally having substituent(s) or alkoxy optionally having substituent(s); R 3 is cyano; R 4 is a hydrogen atom or a halogen atom; R 5 is a hydrogen atom; R 6 is a hydrogen atom; R 7 is alkyl optionally having substituent(s); R 8 is a hydrogen atom, alkyl optionally having substituent(s), alkenyl optionally having substituent(s) or cycloalkyl optionally having substituent(s); R 9 is hydroxy; and ring A is a 5- or 6-membered ring optionally having substituent(s) other than R 6 to R 9 (except 2-chloro-4-[(2S,3S)-3-hydroxy-2-methylpyrrolidin-1-yl]-3-methylbenzonitrile, 2-chloro-4-[(2S,3S)-3-hydroxy-2-methylpyrrolidin-1-yl]benzonitrile, 4-[(2S,3S)-3-hydroxy-2-methylpyrrolidin-1-yl]benzonitrile, 2-chloro-4-[(2S,3S)-3-hydroxy-2-methylpyrrolidin-1-yl]-5-methylbenzonitrile, 2-chloro-3-ethyl-4-[(2S,3S)-3-hydroxy-2-methylpyrrolidin-1-yl]benzonitrile, 4-[(2S,3S)-3-hydroxy-2-methylpyrrolidin-1-yl]-2-(trifluoromethyl)benzonitrile, 4-[(2S,3S)-3-hydroxy-2-methylpyrrolidin-1-yl]-3-(trifluoromethyl)benzonitrile, 4-[(2S,3S)-3-hydroxy-2-isopropylpyrrolidin-1-yl]-2-(trifluoromethyl)benzonitrile, 4-[(2S,3R)-3-hydroxy-2-isopropylpyrrolidin-1-yl]-2-(trifluoromethyl)benzonitrile, and 2-chloro-4-[(2S)-3-hydroxy-2-methylpiperidin-1-yl]benzonitrile), or a salt thereof.