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 4-[4-(2-methoxyethoxymethyl)-8-methylsulfonyl-2,8-diazaspiro[4.5]decan-2-yl]-2-(trifluoromethyl)benzonitrile ?
user
C21H28F3N3O4S
assistant