You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1R,2R)-N-methyl-N-[2-(4-methylpiperidin-1-yl)ethyl]-2-methylsulfonylcyclopentan-1-amine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C15H30N2O2S
assistant