You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (2S,3S,4aS,5R,8aS)-2,3-dimethoxy-2,3-dimethyl-5-phenylmethoxy-5,8a-dihydro-4aH-pyrano[3,4-b][1,4]dioxin-8-one into molecular formula.
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C18H24O7
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