(1-Methylethylidene)bis(4,1-phenyleneoxy-2,1-ethanediyl) diacrylate 130340-91-9 143550-30-5 2-Propenoic acid, (1-methylethylidene)bis(4,1-phenyleneoxy-2,1-ethanediyl) ester 208666-27-7 24447-78-7 EINECS 246-253-2