You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (1S,5R,6R)-3-[(3-chlorophenyl)methyl]-N-cyclobutyl-8-oxa-3-azabicyclo[3.2.1]octane-6-carboxamide into its molecular formula.
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C18H23ClN2O2
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