BIS(2-DIPHENYLPHOSPHINO)ETHYL ETHER;POP;Polypolyols;[BIS(2-DIPHENYLPHOSPHINO)ETHYL]ETHER,MIN.98%;[Bis(2-diphenylphosphino)ethyl]ether, min. 98%;2-(2-diphenylphosphanylethoxy)ethyl-diphenylphosphane;[Bis(2-diphenyL;Phosphine, 1,1'-(oxydi-2,1-ethanediyl)bis[1,1-diphenyl-