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 6-methyl-1-(3-methyl-6-propan-2-yl-[1,2]oxazolo[5,4-b]pyridine-4-carbonyl)piperidine-3-carboxylic acid into molecular formula.
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C18H23N3O4
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