N-{(3R)-1-[(6-fluoro-2-naphthyl)methyl]pyrrolidin-3-yl}-2-[1-(4-hydroxybenzoyl)piperidin-4-ylidene]acetamide
N-{(3R)-1-[(6-fluoro-2-naphthyl)methyl]pyrrolidin-3-yl}-2-[1-(2-hydroxybenzoyl)piperidin-4-ylidene]acetamide
2-[1-(2-fluorobenzoyl)piperidin-4-ylidene]-N-{(3R)-1-[(6-fluoro-2-naphthyl)methyl]pyrrolidin-3-yl}acetamide
2-[1-(3-fluorobenzoyl)piperidin-4-ylidene]-N-{(3R)-1-[(6-fluoro-2-naphthyl)methyl]pyrrolidin-3-yl}acetamide
N-{(3R)-1-[(6-fluoro-2-naphthyl)methyl]pyrrolidin-3-yl}-2-[1-(2-methoxybenzoyl)piperidin-4-ylidene]acetamide