You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-heptadecanoyloxy-3-[(4Z,7Z,10Z,13Z)-hexadeca-4,7,10,13-tetraenoyl]oxypropyl] heptatriacontanoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C73H134O6
assistant