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system
What is the molecular formula of the molecule (6E)-2-bromo-6-[2-bromo-4-(2-ethylhexyl)-5-oxothieno[3,2-b]pyrrol-6-ylidene]-4-(2-ethylhexyl)thieno[3,2-b]pyrrol-5-one;(6E)-4-(2-ethylhexyl)-6-[4-(2-ethylhexyl)-5-oxothieno[3,2-b]pyrrol-6-ylidene]thieno[3,2-b]pyrrol-5-one ?
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C56H74Br2N4O4S4
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