A new C(17)-polyacetylene, named hederyne A (1), has been isolated from the MeOH extract of galls of Hedera rhombea Bean (Araliaceae), together with two known polyacetylenes, falcarindiol (2) and 11,12-dehydrofalcarinol (3). The structure elucidation of 1 was achieved by NMR, MS, IR, and UV
The structure-activity relationship of 12 isolated acetylenes from galls of Hedera rhombea (Araliaceae) induced by Asphondylia sp. (Cecidomyiidae) and their derivatives has been studied for the inhibition of the shoot and root growth of rice, perennial ryegrass, cockscomb, lettuce, and cress. Almost