1-环己基哌啶

2,2-双哌啶

4,4-dimethyl-1-phenyl-pent-2-yn-1-ol

1-cyclohexyl-4,4-dimethyl-1-phenylpent-2-yn-1-ol

2,2,9,9-tetramethyl-5,6-diphenyldeca-3,7-diyne-5,6-diol