| Poly[oxy(1,1,2,2,3,3,4,4-octafluoro-1,4-butanediyl)oxy(1,1,2,2,3,3,4,4-octafluoro-1,4-butanediyl)sulfonyl(ethylimino)-1,2-ethanediyloxycarbonylimino(methyl-1,3-phenylene)iminocarbonyloxy-1,2-ethanediyl(ethylimino)sulfonyl(1,1,2,2-tetrafluoro-1,2-ethanediy |
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