You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-[[4-(1,3-benzodioxol-5-ylmethoxy)-3-bromo-5-methoxyphenyl]methyl]-N',N'-dimethylethane-1,2-diamine;dihydrochloride into its molecular formula.
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C20H27BrCl2N2O4
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