You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(3R,5R,6R)-3-hydroxy-6-[(2R,3S,5S)-4-hydroxy-6-(hydroxymethyl)-5-[(2S,3S,4S,6S)-3-hydroxy-2,4,6-trimethyltetracosanoyl]oxy-3-[(E,4S,6S)-2,4,6-trimethylpentacos-2-enoyl]oxyoxan-2-yl]oxy-4-[(2S,3S,4S,6S)-3-hydroxy-2,4,6-trimethyltetracosanoyl]oxy-5-octadecanoyloxyoxan-2-yl]methyl (E,4S,6S)-2,4,6-trimethylhexacos-2-enoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C141H266O18
assistant