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 butanoyloxymethyl (3R)-3-(4,4-difluoro-2-oxopentyl)-2-hydroxy-3,4-dihydro-1,2-benzoxaborinine-8-carboxylate is given. What is its corresponding molecular formula?
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C19H23BF2O7
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