You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(7Z,10Z,13Z,16Z,19Z)-N-[(4E,8E)-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-hydroxytetratriaconta-4,8-dien-2-yl]docosa-7,10,13,16,19-pentaenamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C74H129NO18
assistant