You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule [2-[(Z)-nonadec-9-enoyl]oxy-3-[(6Z,9Z,12Z,15Z)-octadeca-6,9,12,15-tetraenoyl]oxypropyl] (23Z,26Z)-tetratriaconta-23,26-dienoate .
user
C74H130O6
assistant