You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by 2-(difluoromethylidene)-1,3-dioxolane;1,1,1,2,2,3,3,4,4-nonafluoro-4-[1,1,2,2-tetrafluoro-2-(trifluoromethoxy)ethoxy]butane ?
user
C11H4F18O4
assistant