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 (1R,4S,9S,12R,15R)-4-hydroxy-12-methyl-15-propan-2-yl-2,3-dioxatetracyclo[7.6.1.01,12.04,9]hexadecan-8-one is given. What is its corresponding molecular formula?
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C18H28O4
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