You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule ethyl (4R)-4-(3,5-dichloro-4-hydroxyphenyl)-2-methyl-5-oxo-1,4-dihydroindeno[1,2-b]pyridine-3-carboxylate into molecular formula.
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C22H17Cl2NO4
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