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Paper | Regular issue | Vol 83, No. 5, 2011, pp.1067-1076
Published online, 10th March, 2011
DOI: 10.3987/COM-11-12161
New Antibacterial Polyacetylenes from Sunflower (Helianthus annuus L.) Seedlings

Fumie Seshimoto, Si Won Hong, Haruyuki Nakajyo, and Hideyuki Shigemori*

*Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki 305, Japan

Abstract

Three new C15 polyacetylenes 1, 2, and 3, together with two known C15 polyacetylenes 4 and 5 were isolated from the seedlings of sunflower Helianthus annuus L. cv Russia, and their structures were elucidated by spectroscopic data and chemical means. Compounds 1, 2, 4, and 5 exhibited antimicrobial activity against Staphyrococcus aureus and especially compound 1 showed strong activity.