You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-methyl-3-[2-(oxolan-2-yl)-5-(trifluoromethyl)benzimidazol-1-yl]phenyl]methanol The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H19F3N2O2
assistant