You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(1R)-1-[1-(4-chlorobenzoyl)piperidin-4-yl]-2-(3-methoxyphenyl)ethyl]-N,3-dimethylbutanamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H35ClN2O3
assistant