You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[3-(3-methoxyphenyl)-1H-pyrazol-5-yl]-[4-(2-methylpyrimidin-4-yl)oxypiperidin-1-yl]methanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H23N5O3
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