Dapsone Dimer Impurity

Chemical Name: 4,4'-(hydrazine-1,2-diylbis(4,1-phenylenesulfonyl))dianiline ; 4,4’-Bis(p-aminobenzenesulfonyl)hydrazobenzene ; 4,4’-(4,4’-(Hydrazine-1,2-diyl)bis(4,1-phenylenesulfonyl))dianiline

Smile: NC1=CC=C(S(C2=CC=C(NNC3=CC=C(S(C4=CC=C(N)C=C4)(=O)=O)C=C3)C=C2)(=O)=O)C=C1