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 methyl (3S,4R,6R)-6-[[(4S,7R,7aR)-6-ethyl-4-methyl-2-oxo-3,3a,4,6,7,7a-hexahydropyrano[3,4-d][1,3]oxazol-7-yl]oxy]-3-methyl-4,5-bis(phenylmethoxy)oxane-2-carboxylate is given. What is its corresponding molecular formula?
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C31H39NO9
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