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 (6R)-6-(6-bromo-1,3-benzodioxol-5-yl)-9,9-dimethyl-6,8,10,11-tetrahydro-5H-benzo[b][1,4]benzodiazepin-7-one ?
user
C22H21BrN2O3
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