You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Translate the chemical IUPAC name 3-(dimethylamino)-1-[3-[3-(2-hydroxyphenyl)-7H-pyrrolo[2,3-c]pyridazin-5-yl]azetidin-1-yl]propan-1-one into its molecular formula.
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C20H23N5O2
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