You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule [2-(4-methoxycarbonylanilino)-2-oxoethyl] (3S)-1-(4-methyl-3-nitrophenyl)-5-oxopyrrolidine-3-carboxylate into molecular formula.
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C22H21N3O8
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