You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 4-[[5-(2,5-dichlorophenyl)furan-2-yl]methylidene]-2-ethyl-1,3-dihydrobenzo[b][1,6]naphthyridine-10-carboxylic acid;hydrochloride by IUPAC nomenclature, provide its molecular formula.
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C26H21Cl3N2O3
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