You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [1-hydroxy-3-[(9Z,12Z,15Z)-octadeca-9,12,15-trienoyl]oxypropan-2-yl] (27Z,30Z,33Z,36Z,39Z)-dotetraconta-27,30,33,36,39-pentaenoate by IUPAC nomenclature, provide its molecular formula.
user
C63H108O5
assistant