3-amino-3-(o-aminoanilino)-2-cyano-2-propenal phenylhydrazone

3-Ethoxycarbonylamino-3-(2-aminoanilino)-2-cyano-2-propenyl phenylhydrazone

4-ethoxycarbonylamino-1H-1,5-benzodiazepine-3-carbonitrile

4-Amino-1H-1,5-benzodiazepine-3-carbonitrile