31. Because the coumarin contained in woodruff is toxic, only artificial woodruff flavouring is used in the trade. 32. Another drug, coumarin , has been tried in some countries, though it's not available not here. 33. These bug repelling properties of sweetgrass were later found by the American Chemical Society in the molecules phytol and coumarin . 34. Alcoholic beverages sold in the European Union are limited to a maximum of 10 mg / l coumarin by law. 35. A few varieties of sweet clover have been developed with low coumarin content and are safer for forage and silage. 36. I didn't find them, but I did pick up some vanilla without coumarin , a common chemical additive. 37. Other active ingredients include farnesene, chamazulene, flavonoids ( including apigenin, quercetin, patuletin and luteolin ) and coumarin . 38. He held that from a chemist s point of view, coumarin is an immediate precursor to the rodenticide coumadin. 39. "Gerbera " contains naturally occurring coumarin derivatives . " Gerbera " is a tender perennial plant. 40. It is also involved in the metabolism of several pharmaceuticals, carcinogens, and a number of coumarin -type alkaloids.
