You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 2-[4,4,4-trifluoro-3-[1,1,1-trifluoro-4-(oxan-2-yloxy)butan-2-yl]oxybutoxy]oxane .
user
C18H28F6O5
assistant