You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[[(E)-3-[(11E,14E)-heptadeca-11,14-dienoyl]oxy-2-[[(7E,9E)-nonadeca-7,9-dienoyl]amino]hexadec-4-enoxy]-hydroxyphosphoryl]oxyethyl-trimethylazanium is the IUPAC name of a molecule. Please give its molecular formula.
user
C57H106N2O7P+
assistant