You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[2-[(14Z,17Z,20Z,23Z)-hexacosa-14,17,20,23-tetraenoyl]oxy-3-[(25Z,28Z)-hexatriaconta-25,28-dienoyl]oxypropoxy]-2-[2-(trimethylazaniumyl)ethoxy]acetate is the IUPAC name of a molecule. Please give its molecular formula.
user
C72H129NO8
assistant