title: Isolation, structure determination, and phytotoxicity of unusual dioxopiperazines from the phytopathogenic fungus Phoma lingam.
abstract: The isolation, chemical structure elucidation, and bioactivity of polanrazines B-F, five new dioxopiperazines produced by isolates of the blackleg fungus [Phoma lingam, perfect stage Leptosphaeria maculans (Desm.) Ces. et de Not.] originating from Poland, are reported. Polanrazines C and E showed moderate but selective toxicity, causing necrotic and chlorotic lesions (1-3 mm diameter) on brown mustard leaves.
authors.forename: M S
authors.initials: MS
authors.lastname: Pedras
authors.forename: C J
authors.initials: CJ
authors.lastname: Biesenthal
mesh_terms: D001203:Ascomycota / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry / Q000379:methods; D010879:Piperazines / Q000737:chemistry / Q000302:isolation & purification* / Q000633:toxicity; D010944:Plants / Q000382:microbiology*; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D010879:Piperazines