7,7'-Diamino-5,5'-dichloro-Δ2,2'(3H,3'H)-bibenzo[b]thiophene-3,3'-dione;7-Amino-2-(7-amino-5-chloro-3-oxobenzo[b]thiophen-2(3H)-ylidene)-5-chlorobenzo[b]thiophen-3(2H)-one;C.I.73320;Helindon Grey BR
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