You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-[[4-(3H-benzimidazol-5-yl)-2,6-dichlorophenyl]methyl]-2,3-dihydro-1H-inden-2-amine;dihydrochloride into its molecular formula.
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C23H21Cl4N3
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