You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 2-[carboxy-[2-[(9Z,12Z)-nonadeca-9,12-dienoyl]oxy-3-octatriacontanoyloxypropoxy]methoxy]ethyl-trimethylazanium ?
user
C67H128NO8+
assistant