You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-icosanoyloxy-3-[(Z)-tridec-9-enoyl]oxypropyl] (26Z,29Z,32Z,35Z)-octatriaconta-26,29,32,35-tetraenoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C74H134O6
assistant