You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named N-[1-[5-[3,4-dihydroxy-6-(hydroxymethyl)-5-[3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]oxy-3,4-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-3-hydroxynonan-2-yl]hexanamide by IUPAC nomenclature, provide its molecular formula.
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C33H61NO18
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