1-Benzo[1,3]dioxol-5-yl-penta-3,4-dien-2-one

4,4,6-trimethyl-2-propadienyl-[1,3,2]dioxaborinane

1-(5-tert-Butyl-2,2-dimethyl-[1,3]dioxan-5-yl)-but-3-yn-1-ol

4-(4-bromo-2,5-dimethoxyphenyl)-but-1-yne