You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3S)-3-(hydroxymethyl)-4-(5-methylpyridin-2-yl)-N-[4-(trifluoromethyl)phenyl]-2,3-dihydro-1,4-benzoxazine-8-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H20F3N3O3
assistant