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-(2,4-dimethoxyphenyl)-2-[2-(4-methylphenyl)-4-oxopyrazolo[1,5-d][1,2,4]triazin-5-yl]acetamide ?
user
C22H21N5O4
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