You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule 5,8-bis[5-(5-bromo-4-hexylthiophen-2-yl)-4-hexylthiophen-2-yl]-2,3-dithiophen-2-ylpyrido[3,4-b]pyrazine into molecular formula.
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C55H63Br2N3S6
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