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 5-[2-[2-[2-[(2,2-dimethyl-4,6-dioxo-1,3-dioxan-5-ylidene)methylsulfanyl]ethoxy]ethoxy]ethylsulfanylmethylidene]-2,2-dimethyl-1,3-dioxane-4,6-dione ?
user
C20H26O10S2
assistant