You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1R,2R,3S,4R,5S)-N-[3-chloro-4-(trifluoromethyl)phenyl]-5-hydroxy-3-(2-methoxypyridin-4-yl)-7-oxabicyclo[2.2.1]heptane-2-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H18ClF3N2O4
assistant