You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named (4-but-3-enyl-3-fluorophenyl) 4-(6-but-3-enyl-1,2,3,4,4a,5,6,7,8,8a-decahydronaphthalen-2-yl)-2,3-difluorobenzoate by IUPAC nomenclature, provide its molecular formula.
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C31H35F3O2
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