You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(4-cyanophenyl)-2-(1-oxo-4-phenoxy-[1,2,4]triazolo[4,3-a]quinoxalin-2-yl)acetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C24H16N6O3
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