2,6,7-Trioxabicyclo(2.2.2)octane-3-carbonitrile, 4-(1,1-dimethylethyl)-1-(4-ethynylphenyl)-;4-(1,1-Dimethylethyl)-1-(4-ethynylphenyl)-2,6,7-trioxabicyclo(2.2.2)octane-3-carbonitrile
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