5-oxo-3H-pyrazolo[1,5-c]quinazoline-1,2-dicarboxylic acid

2-Ethyl-1,2,3,4-tetrahydroquinoline

1,2,3,4-四氢吖啶-9-羧酸酰胺

1-(2-溴乙基)-1H-吲哚-2,3-二酮

1,2-di(1-isatinyl)ethane