You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 7-[(2-fluorophenyl)methyl]-2-[[5-(hydroxymethyl)furan-2-yl]methyl]-2,7-diazaspiro[4.5]decan-6-one ?
user
C21H25FN2O3
assistant