You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[[(2R)-2,3-di(icosa-3,6,9,12,15,18-hexaenoyloxy)propoxy]-hydroxyphosphoryl]oxyethyl-trimethylazanium is the IUPAC name of a molecule. Please give its molecular formula.
user
C48H73NO8P+
assistant