12765-28-5 137229-21-1 29117-08-6 79303-88-1 Poly(oxy-1,2-ethanediyl), alpha-(2-(ethyl((heptadecafluorooctyl)sulfonyl)amino)ethyl)-omega-hydroxy- alpha-(2-(Ethyl((heptadecafluorooctyl)sulfonyl)amino)ethyl)-omega-hydroxypoly(oxy-1,2-ethanediyl)