You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(2R)-2-hydroxy-3-(16-methylheptadecanoyloxy)propyl] (9E,11E,15E)-13-hydroxyoctadeca-9,11,15-trienoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C39H70O6
assistant