You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-N-(4-bromophenyl)-4-N-cyclopropyl-3-methylsulfonyl-2H-pyrazolo[3,4-d]pyrimidine-4,6-diamine is the IUPAC name of a molecule. Please give its molecular formula.
user
C15H15BrN6O2S
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