You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 1-[2-[4-(6-methoxyimidazo[1,2-b]pyridazin-3-yl)phenoxy]pyrimidin-5-yl]-3-[2-pyridin-3-yl-4-(trifluoromethyl)phenyl]urea by IUPAC nomenclature, provide its molecular formula.
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C30H21F3N8O3
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