You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named [(3aS,7aR)-1,2,3,4,5,6,7,7a-octahydroisoindol-3a-yl]-[4-(2-propan-2-yloxyethyl)piperazin-1-yl]methanone;dihydrochloride is given. What is its corresponding molecular formula?
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C18H35Cl2N3O2
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