2-(5-Oxobenzo(4,5)phenaleno(1,9-bc)thien-2(5H)-ylidene)benzo(4,5)phenaleno(1,9-bc)thiophen-5(2H)-one;Benzo(4,5)phenaleno(1,9-bc)thiophen-5(2H)-one, 2-(5-oxobenzo(4,5)phenaleno(1,9-bc)thien-2(5H)-ylidene)-
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