You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
8-[(2S)-2-hydroxy-2-(4-methyl-1-methylidene-3H-2-benzofuran-5-yl)ethyl]-2-(4-methyl-5-oxo-2H-furan-3-yl)-2,8-diazaspiro[4.5]decan-1-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H30N2O5
assistant