You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-[3-[(28Z,31Z,34Z)-dotetraconta-28,31,34-trienoyl]oxy-2-[(4Z,7Z,10Z,13Z)-hexadeca-4,7,10,13-tetraenoyl]oxypropoxy]-2-[2-(trimethylazaniumyl)ethoxy]acetate by IUPAC nomenclature, provide its molecular formula.
user
C68H119NO8
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