Nonenolides and cytochalasins with phytotoxic activity against Cirsium arvense and Sonchus arvensis: A structure-activity relationships study

We report the result of a structure-activity relationships study on nonenolides and cytochalasins and some their derivatives on the phytotoxicity against Cirsium arvense and Sonchus arvensis. Stagonolide (1) and cytochalsins B (8) appear to be the most toxic compound.