You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (2S,3S,6S)-5-[(5-ethylpyridin-2-yl)methyl]-3-(4-fluorophenyl)-1,5-diazatricyclo[5.2.2.02,6]undecane by IUPAC nomenclature, provide its molecular formula.
user
C23H28FN3
assistant