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 3-(1-azabicyclo[2.2.2]octan-3-ylamino)-6-chloro-1,2-benzoxazole-7-carbonitrile;hydrochloride into molecular formula.
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C15H16Cl2N4O
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