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 (6-chloroimidazo[1,2-a]pyridin-2-yl)-(2-phenyl-3,4,6,7-tetrahydroimidazo[4,5-c]pyridin-5-yl)methanone is given. What is its corresponding molecular formula?
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C20H16ClN5O
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