keke2005

Thank you very much for your reply. your explanation is right. But These compounds were isolated by Dr. Bohlmann 1973. And the published paper by Wat et al. 1979. Ultraviolet-mediated cytotoxic activity of phenelheptatriyne from Bidens pilosa L. Journal of Natural Products, 42:103-111. narrated those compounds. I know some name of these, eg: IVa is phenylheptatriyne (PHT), and IIb is 1-phenyl-1,-diyn-5-en-7-ol-acetate. I dont know the name of the rest of compounds. You can find the attached the link to download the paper. Plez help :doh: http://www.mediafire.com/?fmntwmzi2mj

Please help give the IUPAC name of some kind of polyacetylene compounds as picture below many thanks:doh::doh: