You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named acetylene;6,11-dihydroxy-1-methoxy-8-methyl-7,8,9,10-tetrahydrotetracene-5,12-dione;pent-2-ene by IUPAC nomenclature, provide its molecular formula.
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C27H30O5
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