You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (1S,5S,7S)-7-[5-(methoxymethyl)furan-2-yl]-3-(2-phenylethyl)-3,8-diazatricyclo[6.3.0.01,5]undecan-2-one by IUPAC nomenclature, provide its molecular formula.
user
C23H28N2O3
assistant