Perfluoro-2,5,8,11-tetramethyl-3,6,9,12-tetraoxapentadecanoyl fluoridePerfluoro-2,5,8,11-tetramethyl-3,6,9,12-tetraoxapentadecanoyl fluoride 97%全氟-2,5,8,11-四甲基-3,6,9,12-四氧杂十五酰氟HFPO pentamer acid fluoridePerfluoro-2,5,8,11-tetramethyl-3,6,9,12-tetraoxapentadecanoyl fluoride