You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Translate the chemical IUPAC name 3-[(2-chloro-4,5-difluorobenzoyl)amino]-N-(2-methoxyethyl)-N-(oxan-4-yl)-1H-pyrazole-5-carboxamide into its molecular formula.
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C19H21ClF2N4O4
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