You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (2R)-N-[(1S)-1-[(1S,2S,4S)-2-bicyclo[2.2.1]heptanyl]ethyl]-1-methylsulfonylpiperidine-2-carboxamide into its molecular formula.
user
C16H28N2O3S
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