134134-01-3 Dimethyl-2-propenyl((4-(4-propyl-2,6,7-trioxabicyclo(2.2.2)oct-1-yl)phenyl)ethynyl)silane Silane, dimethyl-2-propenyl((4-(4-propyl-2,6,7-trioxabicyclo(2.2.2)oct-1-yl)phenyl)ethynyl)-