You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[4-[(1-ethyl-[1,2,4]triazolo[4,3-a]quinoxalin-4-yl)oxy]phenyl]-2,2-dimethylpropanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H23N5O2
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