You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule [2-(3-chloro-4-fluorophenyl)-4-fluoro-2,3-dihydro-1,4-benzoxazin-4-ium-4-yl]-[2-(methylaminomethyl)piperidin-1-yl]methanone ?
user
C22H25ClF2N3O2+
assistant