You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3S)-3,5,5-trimethyl-N-[4-(4-methylpiperidin-1-yl)-3-(piperidine-1-carbonyl)phenyl]hexanamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H43N3O2
assistant