title: Three diterpene glucosides and a diphenylamine derivative from Pieris formosa.
abstract: Three new diterpenoids, pierisformosides G-I (1-3) and a diphenylamine derivative 4 have been isolated from the ethanol extract of Pieris formosa leaves, compound 1 being a new type seco-ring-A kaurane diterpene glucoside. Their structures were elucidated with the aid of NMR spectroscopy including two-dimensional-NMR techniques.
authors.affiliation: Shanghai Institute of Materia Medica, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 294 Tai-Yuan Road, 200031, Shanghai, PR China.
authors.forename: L Q
authors.initials: LQ
authors.lastname: Wang
authors.forename: G W
authors.initials: GW
authors.lastname: Qin
authors.forename: S N
authors.initials: SN
authors.lastname: Chen
authors.forename: C J
authors.initials: CJ
authors.lastname: Li
mesh_terms: D004159:Diphenylamine / Q000737:chemistry*; D004224:Diterpenes / Q000737:chemistry*; D029791:Ericaceae; D006801:Humans; D008517:Phytotherapy; D010936:Plant Extracts / Q000737:chemistry*; D018515:Plant Leaves
chemical_list: D004224:Diterpenes; D010936:Plant Extracts; D004159:Diphenylamine