Perfluoro 2 5 8 trimethyl 3 6 9 trioxadodecanoic acid July 8, 2019 16 32 64 128 Perfluoro-3 6 9-trioxaundecane-1 11-dioic acid Perfluoro-3 5 7-trioxaoctanoic acid Perfluorophenyl 2 2 2-trifluoroacetate