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 [(Z)-4-[[(Z)-4-(2,2-dimethylpropanoyloxymethylsulfanyl)but-2-enyl]disulfanyl]but-2-enyl]sulfanylmethyl 2,2-dimethylpropanoate .
user
C20H34O4S4
assistant