Ethyl 4-((2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,9-heptadecafluorononanoyl)amino)benzoate (en)benzoic Acid, 4-[(2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,9-heptadecafluoro-1-oxononyl)amino]-, Ethyl Ester (en)