You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule [(2R,3S)-3-(2-chlorophenyl)-2-(hydroxymethyl)morpholin-4-yl]-(2-methylimidazo[1,2-a]pyridin-8-yl)methanone into molecular formula.
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C20H20ClN3O3
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