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P > Poly[oxy-1,3-phenyleneoxy-1,3-phenyleneiminocarbonyl( carboxyphenylene)carbonyl(carboxyphenylene) carbonylimino-1,3-phenylene],R- [3-[[carboxy[carboxy[[(3-ethynylphenyl)amino]- carbonyl]benzoyl]benzoyl]amino]phenyl]-ö- ethynyl-
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