You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(3-fluorophenyl)-1-[4-(2-pyridin-4-yloxyethyl)-1-oxa-9-azaspiro[5.5]undecan-9-yl]ethanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C24H29FN2O3
assistant