You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (1S,3aR,7aS)-7a-methyl-4-oxo-2,3,3a,5,6,7-hexahydro-1H-indene-1-carboxylic acid into its molecular formula.
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C11H16O3
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