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 [(2S)-3-[(3R)-1-(4-chlorophenyl)-2,5-dioxopyrrolidin-3-yl]sulfanyl-1-ethoxy-1-oxopropan-2-yl]azanium is given. What is its corresponding molecular formula?
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C15H18ClN2O4S+
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