You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named (1S,2R,6R)-1,2-dimethyl-3-oxo-2-(3-oxobutyl)-6-(phenylmethoxymethyl)cyclohexane-1-carboxylic acid is given. What is its corresponding molecular formula?
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C21H28O5
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