2,2'-((1-Methylethylidene)bis(4,1-phenyleneoxy-3,1-propanedioxy) 72319-24-5 Oxirane, 2,2'-((1-methylethylidene)bis(4,1-phenyleneoxy-3,1-propanediyloxy-4,1-phenylene(1-methylethylidene)-4,1-phenyleneoxymethylene))bis-