methyl 3-(2-oxopyrrolidin-1-yl)prop-2-enoate

methyl 2,5-diphenyl-3,4-dihydropyrazole-3-carboxylate

(R)-methyl 1-oxo-1,2,3,4-tetrahydroisoquinoline-3-carboxylate

methyl (3S)-1-oxo-3,4-dihydro-2H-isoquinoline-3-carboxylate

dimethyl 2,4-dimethylidenepentanedioate