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 1-[2-chloro-6-(2,2-difluoroethoxy)pyridin-4-yl]-3-[[5-(3,3-difluoroazetidin-1-yl)-6-[1-methyl-3-(trifluoromethyl)pyrazol-4-yl]pyridazin-3-yl]methyl]urea into molecular formula.
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C21H18ClF7N8O2
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