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 1-propan-2-yl-5-(pyridine-3-carbonyl)-N-(thiophen-2-ylmethyl)-6,7-dihydro-4H-imidazo[4,5-c]pyridine-2-carboxamide is given. What is its corresponding molecular formula?
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C21H23N5O2S
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