You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(2R)-1-[2-(difluoromethoxy)anilino]-1-oxopropan-2-yl] 1-oxo-2H-isoquinoline-3-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H16F2N2O5
assistant