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 1,1,1,2,2,3,4,4,5,5,5-undecafluoro-3-(1,1,1,2,3,3,3-heptafluoropropan-2-yl)pentane .
user
C8F18
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