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 2-(3,4-dimethoxyphenyl)ethyl-[(2S)-1-(4-ethylanilino)-1-oxopropan-2-yl]-methylazanium is given. What is its corresponding molecular formula?
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C22H31N2O3+
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