You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named ethyl (5R,6S,7R)-8-bromo-2-[(2-chlorophenyl)carbamoyl]-3-[(2S)-1-hydroxybutan-2-yl]-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]decane-6-carboxylate by IUPAC nomenclature, provide its molecular formula.
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C22H26BrClN2O6
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