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 N-[1-[3-(4-hydroxyphenyl)-2,6-dimethylimidazo[1,2-b]pyridazin-8-yl]pyrrolidin-3-yl]acetamide into molecular formula.
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C20H23N5O2
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