You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (3S)-3-[[4-(cyclobutylmethyl)piperazin-1-yl]methyl]-1-(2,2-dimethylpropyl)-3-hydroxypiperidin-2-one into its molecular formula.
user
C20H37N3O2
assistant