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 magnesium;5-[(4-cyanophenyl)methyl]-7-(3,5-dichlorophenyl)-5-methyl-6-oxoimidazo[1,2-a]imidazole-3-sulfinate;bromide into molecular formula.
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C20H13BrCl2MgN4O3S
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