You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [4,4,5,5,6,6,7,7,8,8,9,9,9-tridecafluoro-2-(2-methylprop-2-enoyloxy)nonyl] 2-methyl-3-(2-methylprop-2-enoyloxy)-2-(2-methylprop-2-enoyloxymethyl)propanoate by IUPAC nomenclature, provide its molecular formula.
user
C26H27F13O8
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