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-[(7Z,9Z,11Z,13Z,15Z)-octadeca-7,9,11,13,15-pentaenoyl]oxy-3-[(6Z,9Z,12Z)-pentadeca-6,9,12-trienoyl]oxypropyl] (7Z,9E,11Z,13Z,15Z,17Z)-icosa-7,9,11,13,15,17-hexaenoate .
user
C56H80O6
assistant