You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule [5-hydroxy-3-methylidene-5-(trifluoromethyl)pyrazolidin-1-yl]-[5-(naphthalen-2-yloxymethyl)furan-2-yl]methanone .
user
C21H17F3N2O4
assistant