You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (27Z,30Z)-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-hydroxyhexacosan-2-yl]octatriaconta-27,30-dienamide by IUPAC nomenclature, provide its molecular formula.
user
C82H155NO18
assistant