You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (2R)-2-(methanesulfonamido)-3,3-dimethyl-N-[(2S)-1-(2-methylphenyl)propan-2-yl]butanamide by IUPAC nomenclature, provide its molecular formula.
user
C17H28N2O3S
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