You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 5-acetamido-2-[2-[6-[(E)-2-[[(Z)-hexadec-7-enoyl]amino]-3-hydroxypentacos-4-enoxy]-4,5-dihydroxy-2-(hydroxymethyl)oxan-3-yl]oxy-3,5-dihydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-4-hydroxy-6-(1,2,3-trihydroxypropyl)oxane-2-carboxylic acid by IUPAC nomenclature, provide its molecular formula.
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C64H116N2O21
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