You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[[(E)-3-[(14Z,17Z,20Z)-hexacosa-14,17,20-trienoyl]oxy-2-[[(9Z,12Z,15Z,18Z,21Z)-tetracosa-9,12,15,18,21-pentaenoyl]amino]hexadec-4-enoxy]-hydroxyphosphoryl]oxyethyl-trimethylazanium The above is the IUPAC name of a molecule. Write its molecular formula.
user
C71H126N2O7P+
assistant