You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule 5-(2-chloro-4-fluorobenzoyl)-2-(2-methoxyethyl)-3,4,6,6a-tetrahydro-1H-pyrrolo[3,4-c]pyrrole-3a-carboxylic acid into molecular formula.
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C17H20ClFN2O4
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