You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named (2R,3R,7R,7aR)-3-hydroxy-7-methyl-2-[(E)-prop-1-enyl]-2,3,7,7a-tetrahydrofuro[3,4-b]pyran-5-one by IUPAC nomenclature, provide its molecular formula.
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C11H14O4
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