You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-(8-azabicyclo[3.2.1]octan-3-yl)-N-methyl-N-(2-oxo-1-phenylpiperidin-3-yl)acetamide;hydrochloride into its molecular formula.
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C21H30ClN3O2
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