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 2-(4-methoxyphenyl)-2-[(8-methyl-5,6,7,8-tetrahydroimidazo[1,2-a]pyridine-3-carbonyl)amino]acetic acid into molecular formula.
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C18H21N3O4
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