You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[1-hydroxy-3-[(6Z,9Z,12Z,15Z)-octadeca-6,9,12,15-tetraenoxy]propan-2-yl] (13Z,16Z)-tetracosa-13,16-dienoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C45H78O4
assistant