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-chloro-5-cyano-N-[3,3-dimethyl-2-(propan-2-ylamino)butyl]-2-methoxybenzamide;hydrochloride by IUPAC nomenclature, provide its molecular formula.
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C18H27Cl2N3O2
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