Pyridinium,1-[2-[[4-[(2,6-dichloro-4-nitrophenyl)azo]phenyl]ethylamino]ethyl]-, chloride(9CI); Pyridinium,1-[2-[p-[(2,6-dichloro-4-nitrophenyl)azo]-N-ethylanilino]ethyl]-, chloride(8CI)
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