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 3-[3,6-dihydroxy-2,5-bis[3-[(Z)-2-hydroxybut-2-enoyl]oxypropoxy]-4-[3-[(E)-2-hydroxybut-2-enoyl]oxypropoxy]hexoxy]propyl (Z)-2-hydroxybut-2-enoate .
user
C34H54O18
assistant