You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (2R)-2-[(2-methylpropan-2-yl)oxycarbonylamino]-3-[4-[3-(trifluoromethyl)phenoxy]phenyl]propanoic acid into its molecular formula.
user
C21H22F3NO5
assistant