((4-(4-Propyl-2,6,7-trioxabicyclo(2.2.2)oct-1-yl)phenyl)ethynyl)triethylsilane 134134-07-9 Silane, ((4-(4-propyl-2,6,7-trioxabicyclo(2.2.2)oct-1-yl)phenyl)ethynyl)triethyl-