1-氧代嘧啶并[1,2-a]喹啉-2-羧酸乙酯

diethyl 2-[[(6-acetamido-2-methylsulfanylpyrimidin-4-yl)amino]methylidene]propanedioate

ethyl 4-acetamido-2-methylsulfanyl-5-oxo-8H-pyrido[2,3-d]pyrimidine-6-carboxylate

二乙基2-[[[3-(三氟甲基)苯基]氨基]亚甲基]丙二酸酯

diethyl 2-[(N-methylanilino)methylidene]propanedioate