dimethoxy(3-methylbuta-1,2-dienyl)borane

4,4,6-trimethyl-2-(3-methylbuta-1,2-dienyl)-1,3,2-dioxaborinane

3-propan-2-yl-4-prop-1-en-2-ylthiophene

3-propan-2-yl-4-prop-1-en-2-ylthiophene 1,1-dioxide