You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-chloro-N-[3-chloro-1-(1-cyclopropylsulfonylpiperidin-4-yl)pyrazol-4-yl]-1-ethylpyrazolo[3,4-d]pyrimidin-6-amine is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H22Cl2N8O2S
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