You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[1-[(E)-tridec-8-enoyl]oxy-3-[(2R,5R,6R)-3,4,5-trihydroxy-6-[[(2R,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxymethyl]oxan-2-yl]oxypropan-2-yl] (9E,11E,13E)-hexadeca-9,11,13-trienoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C44H74O15
assistant