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 4-[2-[(13E,16E,19E)-docosa-13,16,19-trienoyl]oxy-3-tridecanoyloxypropoxy]-2-(trimethylazaniumyl)butanoate ?
user
C45H81NO7
assistant