You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 1-[3-[[(4-amino-1-methylpyrazolo[3,4-d]pyrimidin-6-yl)amino]methyl]piperidin-1-yl]ethanone into its molecular formula.
user
C14H21N7O
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