[2-(4-Bromo-phenylamino)-1-phenyl-1H-pyrrolo[2,3-b]quinoxalin-3-yl]-phenyl-methanone

4-Benzoyl-5-(4-bromo-phenylamino)-1-phenyl-1H-pyrrole-2,3-dione

4-Benzoyl-1-phenyl-5-p-tolylamino-1H-pyrrole-2,3-dione

4-Benzoyl-1-phenyl-5-phenylamino-1H-pyrrole-2,3-dione

4-Benzoyl-5-benzylamino-1-phenyl-1H-pyrrole-2,3-dione