可以提供原料：CAS586-91-4 4,4′-偶氮苯二羧酸！

(E)-1,2-bis(4-carboxyphenyl)diazene 1-oxide

CAS：582-69-4
Chemical Formula: C14H10N2O5
Molecular Weight: 286.2430
m/z: 286.0590 (100.0%), 287.0623 (15.1%), 288.0657 (1.1%), 288.0632 (1.0%)
Elemental Analysis: C, 58.75; H, 3.52; N, 9.79; O, 27.95