You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(5R)-5-methyl-3-[[4-[4-(trifluoromethyl)phenyl]phenyl]methyl]-1,3-oxazolidin-2-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H16F3NO2
assistant