[6-(4-chlorophenyl)-2,6-dimethyl-5,6-dihydro-4H-pyran-3-yl]-(4-methylpiperidin-1-yl)methanone
[6-(4-fluorophenyl)-2,6-dimethyl-5,6-dihydro-4H-pyran-3-yl]-(4-methylpiperidin-1-yl)methanone
(2,6-dimethyl-6-phenyl-5,6-dihydro-4H-pyran-3-yl)-(4-methylpiperidin-1-yl)methanone