ethyl 2-oxo-2-[[6-(2-phenylethenyl)pyridin-2-yl]amino]acetate

ethyl 1-methyl-4-oxoquinazoline-2-carboxylate

ethyl 1-(4-ethoxy-4-oxobutyl)-4-oxoquinazoline-2-carboxylate

Ethyl 3-(1,3-benzodioxol-5-yl)-1,2,4-oxadiazole-5-carboxylate

2-氧代-2-(1H-吡咯并[2,3-c]吡啶-3-基)乙酸乙酯