You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 2-[3-[(4S)-2-amino-6-(fluoromethyl)-4-methyl-1,3-oxazin-4-yl]-4-fluorophenyl]-1-[3-(difluoromethyl)-5-ethynylpyridin-2-yl]ethanone is given. What is its corresponding molecular formula?
user
C22H17F4N3O2
assistant