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 N-[4-(6-ethyl-10-methyl-8-oxo-2,4-dihydropyrano[3,2-g][1,3]benzoxazin-3-yl)phenyl]acetamide ?
user
C22H22N2O4
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