ethyl N-[(benzyloxy)carbonyl]glycyl-O-ethyl-3-oxoserinate

3-氨基-1H-吡咯-2-甲酸乙酯

二乙基2-乙酰胺基-2-(4-辛基苯乙基)丙二酸酯

diethyl 2-(butylcarbamoylamino)propanedioate

(5Z)-2-[3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]-5-[ethoxy(hydroxy)methylidene]-1H-imidazol-4-one