You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule [3-[(3Z,6Z,9Z,12Z,15Z)-octadeca-3,6,9,12,15-pentaenoyl]oxy-2-tricosanoyloxypropyl] (10Z,13Z,16Z,19Z,22Z,25Z)-octacosa-10,13,16,19,22,25-hexaenoate into molecular formula.
user
C72H118O6
assistant