You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 4-[6-[(3,4-dichlorophenyl)methylamino]imidazo[1,2-b]pyridazin-3-yl]-N-(2-hydroxyethyl)benzamide into its molecular formula.
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C22H19Cl2N5O2
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