You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (4-nitrophenyl)methyl N-[(3R)-1-[(2S,4S)-1-methyl-4-sulfanylpyrrolidine-2-carbonyl]pyrrolidin-3-yl]carbamate into its molecular formula.
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C18H24N4O5S
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