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 (1R,2R,3R)-2-(3-chlorophenyl)-3-(4-chlorophenyl)sulfonyl-1-(ethoxymethyl)cyclopropan-1-amine is given. What is its corresponding molecular formula?
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C18H19Cl2NO3S
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