You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name [(6S,9R)-6-(2,3-dichlorophenyl)-3-ethyl-6,7,8,9-tetrahydro-5H-imidazo[1,2-a]azepin-9-yl]carbamic acid into its molecular formula.
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C17H19Cl2N3O2
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