Allergenic component of a liverwort: a sesquiterpene lactone.
Frullania spp. (Hepaticae, Jungermanniales) are agents of allergies. Extraction and fractionation of Frullania tamarisci has given, as the only allergenic component isolated, a levorotatory crystalline sutbstance, the structure of which is demonstrated. It is a sesquiterpene lactone. The racemic (+/-) form is isolated from a mixed sample of Frullania tamarisci and Frullania dilatata; the dextrorotatory form, from Frullania dilatata. The observed allergenic properties are shared by some other-sesquiterpene lactones.
D002850:Chromatography, Gel; D003877:Dermatitis, Contact / Q000139:chemically induced*; D006801:Humans; D007783:Lactones / Q000302:isolation & purification* / Q000633:toxicity; D009682:Magnetic Resonance Spectroscopy; D010936:Plant Extracts / Q000633:toxicity; D010944:Plants; D013237:Stereoisomerism; D013729:Terpenes / Q000302:isolation & purification* / Q000633:toxicity
D007783:Lactones; D010936:Plant Extracts; D013729:Terpenes