Poly(oxy-1,4-fenylensulfonyl-1,4-fenylenoxy-1,4-fenylenisopropyliden-1,4-fenylen), i former som nævnt i bestemmelse 6 b) til dette kapitel
Poly(oxy-1,4-phenylenesulphonyl-1,4-phenyleneoxy-1,4-phenyleneisopropylidene-1,4-phenylene), in one of the forms mentioned in note 6(b) to this chapter