You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 2-[(E)-2-(1,3-dithiolan-2-ylidene)-6,6-dimethyl-3-oxohept-4-enyl]-5,5-dimethylcyclohexane-1,3-dione by IUPAC nomenclature, provide its molecular formula.
user
C20H28O3S2
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