You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[3-[(Z)-hexadec-9-enoyl]oxy-2-tetracosanoyloxypropyl] (5Z,8Z,11Z,14Z,17Z,20Z,23Z)-hexacosa-5,8,11,14,17,20,23-heptaenoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C69H118O6
assistant