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 (6aS)-5-butanoyl-7,8,9,10-tetrahydro-6aH-pyrido[2,1-c][1,4]benzodiazepine-6,12-dione is given. What is its corresponding molecular formula?
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C17H20N2O3
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