3-(2-aminoanilino)prop-2-enal

2-(1,3-dihydrobenzimidazol-2-ylidene)indene-1,3-dione

4-(1,3-dihydrobenzimidazol-2-ylidene)-3-hydroxycyclohexa-2,5-dien-1-one

3-thiophen-2-yl-1H-quinoxalin-2-one