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 [7-(methoxymethyl)-8-(4-methoxyphenyl)-4-methylpyrazolo[5,1-c][1,2,4]triazin-3-yl]-piperidin-1-ylmethanone ?
user
C21H25N5O3
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