134133-97-4 Dimethyl((4-(4-propyl-2,6,7-trioxabicyclo(2.2.2)oct-1-yl)phenyl)ethynyl)silane Silane, dimethyl((4-(4-propyl-2,6,7-trioxabicyclo(2.2.2)oct-1-yl)phenyl)ethynyl)-