title: Studies on herbal remedies I: Analysis of herbal smoking preparations alleged to contain lettuce (Lactuca sativa L.) and other natural products.
mesh_terms: D000470:Alkaloids / Q000032:analysis; D008517:Phytotherapy; D010946:Plants, Medicinal / Q000032:analysis*; D011619:Psychotropic Drugs / Q000032:analysis
chemical_list: D000470:Alkaloids; D011619:Psychotropic Drugs