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 8-(2-chloropyridine-3-carbonyl)-3-[[4-(trifluoromethyl)phenyl]methyl]-1-oxa-3,8-diazaspiro[4.5]decan-2-one ?
user
C21H19ClF3N3O3
assistant