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 calcium;(Z)-but-2-enedioate;2,2-dibutyl-1,3,2-dioxastannepine-4,7-dione is given. What is its corresponding molecular formula?
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C16H22CaO8Sn
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