17989-89-8 2,5-Diamino-3,4-dicyanothiophene 2,5-Diamino-3,4-thiophenedicarbonitrile 3,4-Thiophenedicarbonitrile, 2,5-diamino- 5-18-12-00287 (Beilstein Handbook Reference) BRN 0145523 NSC 409127