Abstract The investigation of three Leucanthemum species afforded, in addition to known compounds, two new C 17-acetylenes, a new isovalerate, two phenolic acetylenes, a C 12- isobutylamide and a new farnesol derivative. Chrysanthemum ferulaceum contains deacetyllaurenobiolide (spiciformin) which is identical with a lactone from Inula britannica previously assumed to be a cis, cis-germacranolide.
![[(1S,9R,10R)-3,7-dimethyl-11-methylidene-12-oxo-13-oxabicyclo[8.3.0]trideca-3,7-dien-9-yl] acetate结构式](https://image.chemsrc.com/caspic/267/35001-25-3.png)