You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[7-[2-amino-5-[(3,5-dichloropyridin-4-yl)methoxy]benzenecarboximidoyl]-2,3-dihydropyrido[2,3-b][1,4]oxazin-1-yl]-(2-methylpyrimidin-4-yl)methanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H21Cl2N7O3
assistant