2-(1-phenylbenzimidazol-2-yl)acetonitrile

Ethyl 3-amino-2-cyanoacrylate

diethyl 2-amino-5-[[5-amino-3,4-bis(ethoxycarbonyl)-1H-pyrrol-2-yl]disulfanyl]-1H-pyrrole-3,4-dicarboxylate

diethyl 2-aminoazulene-1,3-dicarboxylate

ethyl 3-cyano-2-hydroxyazulene-1-carboxylate