You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[carboxy-[2-[(11Z,14Z,17Z,20Z,23Z)-hexacosa-11,14,17,20,23-pentaenoyl]oxy-3-[(22Z,25Z,28Z,31Z)-tetratriaconta-22,25,28,31-tetraenoyl]oxypropoxy]methoxy]ethyl-trimethylazanium The above is the IUPAC name of a molecule. Write its molecular formula.
user
C70H120NO8+
assistant