You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(2R)-2-icosanoyloxy-3-[(9E,12E,15E)-octadeca-9,12,15-trienoyl]oxypropyl] (4E,7E,10E,13E,16E,19E)-docosa-4,7,10,13,16,19-hexaenoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C63H104O6
assistant