You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-chloro-9-[2-(3-methoxyphenyl)ethyl]-3,4-dimethyl-8,10-dihydropyrano[2,3-f][1,3]benzoxazin-2-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H22ClNO4
assistant