You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (1R,2S,3R,5S,6R,8R,9S,10S)-7,7-dibromopentacyclo[6.3.0.02,6.03,10.05,9]undecan-1-ol by IUPAC nomenclature, provide its molecular formula.
user
C11H12Br2O
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