You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl (2S,5R,6S)-6-(3-oxopropyl)-2-(phenylmethoxymethyl)-1-azaspiro[4.5]decane-1-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C25H37NO4
assistant