You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named methyl 2-[[(4S)-4-(2,3-difluorophenyl)-1,4,6,7-tetrahydroimidazo[4,5-c]pyridine-5-carbonyl]amino]-5-fluorobenzoate by IUPAC nomenclature, provide its molecular formula.
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C21H17F3N4O3
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