Coreopsis lanceolata

Several nematicidal acetylenic compounds have been isolated. Most are from the Asteraceae (127). Recently isolated are (8R,9R, 10S)-9,10-epoxyheptadec-16-ene-4,6-diyne-8-ol and other compounds from Cirsium. iaponicum (128,129). 1-Phenylhepta-l,3,5-triyne and 2-phehyl-5-(1 -jjropynyl)-thiopene, from Coreopsis lanceolata and cis-dehydromatricaria ester from Soli dago altissima have been shown to be fly ovicidal substances (130,131). 

Shimokoriyama, M., and Hattori, S. 1953. Anthochlor pigments of Cosmos sulphureus, Coreopsis lanceolata and C. saxicola. J. Am. Chem. Soc. 76, 1900. 

Isol. from leaf oil of Coreopsis grandiflora and from C. lanceolata. Shows nematocidal and insecticidal props. Prismatic needles (CgH /pet. ether). Mp 44°. 

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