1-((4S,5S)-2,2-Dimethyl-5-pent-3-ynyl-[1,3]dioxolan-4-ylmethyl)-cyclohexa-2,5-dienecarboxylic acid

1-bromo-octa-2,6-diyne

undeca-2,5,9-triyn-1-ol

1-bromo-undeca-2,5,9-triyne