N,N-diethyl-1-(acetyloxy)-4-methyl-3-phenyl-2-azetidinone-4-carboxamide

N,N-diethyl-2,3-dihydro-2,4-dimethyl-3-phenyl-2-azetecarboxamide 1-oxide

methyl 6-<(diethylamino)carbonyl>-1,4,5,6-tetrahydro-6-methyl-5-phenyl-3-pyridinecarboxylate

N,N-diethyl-5-hydroxy-3-methyl-4-phenyl-3-isoxazolidinecarboxamide