You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-[(Z)-octacos-17-enoyl]oxy-3-[(Z)-tridec-9-enoyl]oxypropyl] (Z)-triacont-19-enoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C74H138O6
assistant