You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name [2-[(7Z,10Z,13Z,16Z,19Z)-docosa-7,10,13,16,19-pentaenoyl]oxy-3-[(Z)-nonadec-9-enoyl]oxypropyl] (12Z,15Z,18Z)-hexacosa-12,15,18-trienoate ?
user
C70H118O6
assistant