You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (2R)-1-[4-(4-chlorophenyl)-3,3-dimethylpiperidin-1-yl]-2-[(2-cyclohex-2-en-1-yl-2-pyrrolidin-1-ylethyl)amino]-3-methylbutan-1-one;methane;dihydrate into molecular formula.
user
C31H54ClN3O3
assistant