Chemical Name: 5-Methyl-2-[(2-nitrophenyl)amino]thiophene-3-carbonitrile (as per EP); 2-Methyl-10H-thieno-[2,3-b][1,5]benzodiazepin-4[5H]-one (as per USP)

Smiles: N#CC1=C(NC2=CC=CC=C2[N+]([O-])=O)SC(C)=C1