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 (9,12,18-trihydroxy-8,17-dimethyl-3,12-dioxo-2,4,7,11,13,16-hexaoxa-3lambda5,12lambda5-diphosphatricyclo[13.2.1.06,10]octadecan-3-yl)oxymethyl acetate is given. What is its corresponding molecular formula?
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C15H26O14P2
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