You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 3-[(3aR,6aS)-3',3'-bis[(9Z,12Z)-octadeca-9,12-dienyl]spiro[4,5,6,6a-tetrahydro-3aH-cyclopenta[d][1,3]dioxole-2,1'-cyclobutane]-5-yl]propyl methyl phosphate by IUPAC nomenclature, provide its molecular formula.
user
C49H86O6P-
assistant