title: A new 1,5-seco grayanotoxin from Rhododendron decorum.
abstract: A new minor 1,5-seco-5-oxo-grayanotoxin named grayanotoxin XXI (1), together with three known grayanotoxins, grayanotoxins I, IV and VIII, has been isolated from the leaves of Rhododendron decorum (Ericaceae). The structure of the new compound (1) was determined on the basis of spectroscopic data.
authors.affiliation: Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.
authors.forename: Hua-Ping
authors.initials: HP
authors.lastname: Zhang
authors.forename: Hong-Bing
authors.initials: HB
authors.lastname: Wang
authors.forename: Li-Quan
authors.initials: LQ
authors.lastname: Wang
authors.forename: Guan-Hu
authors.initials: GH
authors.lastname: Bao
authors.forename: Guo-Wei
authors.initials: GW
authors.lastname: Qin
mesh_terms: D004224:Diterpenes / Q000737:chemistry / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D029793:Rhododendron / Q000737:chemistry*; D014118:Toxins, Biological / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D004224:Diterpenes; D014118:Toxins, Biological; C497274:grayanotoxin XXI; C001311:grayanotoxin I