You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-benzyl-N-[[4-[(2-methylpropan-2-yl)oxy]phenyl]methyl]-4-(2-methylpropyl)-4,9-diazatricyclo[4.3.1.03,7]decane-1-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C31H43N3O2
assistant