2,2'-((1-Methylethylidenedithio)bis(p-phenyleneoxy))bis(2-methylpropionic acid) 2,2-Bis-(4-(alpha-carbossiisopropossi)fenilmercapto)propano [Italian] 99661-85-5 MG 6887 Propanoic acid, 2,2'-((1-methylethylidene)bis(thio-4,1-phenyleneoxy))bis(2-methyl- Propionic acid, 2,2'-((1-methylethylidenedithio)bis(p-phenyleneoxy))bis(2-methyl-