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 (4-imidazol-1-yl-3-nitrophenyl)-(2-methyl-2,3-dihydroindol-1-yl)methanone is given. What is its corresponding molecular formula?
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C19H16N4O3
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