You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named 2-[(5R,10bR)-9-chloro-2-thiophen-2-yl-5,10b-dihydro-1H-pyrazolo[1,5-c][1,3]benzoxazin-5-yl]-4-bromophenol is given. What is its corresponding molecular formula?
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C20H14BrClN2O2S
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