You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (Z)-N-[1-[3,4-dihydroxy-6-(hydroxymethyl)-5-[3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]oxy-3-hydroxypentacosan-2-yl]hexatriacont-25-enamide by IUPAC nomenclature, provide its molecular formula.
user
C73H141NO13
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