You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(6-benzamido-1,3-dimethyl-2,4-dioxopurino[7,8-a][1,3,5]triazin-8-yl)benzamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H18N8O4
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