5H-吡嗪并[2,3-b]吲哚

2-氨基苯甲亚胺酸

2-(2-acetamidophenyl)-2-oxoacetamide

N-[2-(6-oxo-2,3-dihydro-1H-pyrazin-5-yl)phenyl]acetamide

2-(1-acetyl-2-oxoindol-3-ylidene)propanedinitrile