You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 4-[2-[(E)-dodec-5-enoyl]oxy-3-[(14E,16E)-tricosa-14,16-dienoyl]oxypropoxy]-2-(trimethylazaniumyl)butanoate .
user
C45H81NO7
assistant