123171-68-6 221233-86-9 Poly(difluoromethylene), alpha-(2-(acetyloxy)-3-((carboxymethyl)dimethylammonio)propyl)-omega-fluoro-, hydroxide, inner salt Poly(difluoromethylene), alpha-(2-(acetyloxy)-3-((carboxymethyl)dimethylammonio)propyl)-omega-fluoro-, inner salt