You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance [2-[(12Z,15Z,18Z)-hexacosa-12,15,18-trienoyl]oxy-3-nonanoyloxypropyl] (27Z,30Z)-octatriaconta-27,30-dienoate .
user
C76H138O6
assistant