You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 4,13-dihydroxy-12-methyl-13-propan-2-yl-2,10-dioxatetracyclo[5.4.1.18,11.04,12]tridecane-3,9-dione into molecular formula.
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C15H20O6
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