You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[hydroxy-[3-hydroxy-2-[[(Z)-pentadec-9-enoyl]amino]heptatriacontoxy]phosphoryl]oxyethyl-trimethylazanium is the IUPAC name of a molecule. Please give its molecular formula.
user
C57H116N2O6P+
assistant