You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named (1-morpholin-4-yl-1-oxopropan-2-yl) (E)-3-[5-chloro-1-[(2,4-dichlorophenyl)methyl]-3-methylpyrazol-4-yl]prop-2-enoate by IUPAC nomenclature, provide its molecular formula.
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C21H22Cl3N3O4
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