You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-[(9Z,12Z,15Z,18Z,21Z)-tetracosa-9,12,15,18,21-pentaenoyl]oxy-3-undecanoyloxypropyl] (Z)-dotriacont-21-enoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C70H124O6
assistant