You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (2S)-N-[(2R)-butan-2-yl]-2-[[2-(N-(4-chlorophenyl)sulfonyl-4-ethoxyanilino)acetyl]-[(4-methoxyphenyl)methyl]amino]propanamide into its molecular formula.
user
C31H38ClN3O6S
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