4,4'-(p-Phenylene)bis(dimethylsilylene)bis(trimethylene)dimorpholine dihydrochloride 84584-51-0 Morpholine, 4,4'-(1,4-phenylenebis((dimethylsilylene)-3,1-propanediyl))bis-, dihydrochloride Morpholine, 4,4'-(p-phenylene)bis(dimethylsilylene)bis(trimethylene)di-, dihydrochloride