You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (2S)-N-[(2S)-butan-2-yl]-2-[[2-(2-methyl-N-methylsulfonyl-5-nitroanilino)acetyl]-[(3-methylphenyl)methyl]amino]-3-phenylpropanamide into molecular formula.
user
C31H38N4O6S
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