Ethyl 1-[[3-chloro-5-(trifluoromethyl)pyridin-2-yl](methyl)amino]-2-methyl-6-oxo-1,4,5,6-tetrahydropyridine-3-carboxylateEthyl 1-[[3-chloro-5-(trifluoromethyl)-2-pyridinyl ](methyl)amino]-2-methyl-6-oxo-1,4,5,6-tetrahydro-ethyl 1-[[3-chloro-5-(trifluoromethyl)-2-pyridinyl](methyl)amino]-2-methyl-6-oxo-1,4,5,6-tetrahydro-3-pyridinecarboxylate