title: Two new labdane-type diterpenes from the wood of Cunninghamia konishii.
abstract: Phytochemical investigation of the methanol extract of the wood of Cunninghamia konishii resulted in the isolation of two new acidic labdane-type diterpenoids, 12(S)-hydroxy-15,16-epoxylabda-8(17),13-dien-19-oic acid (1) and 12(S)-hydroxy-15,16-epoxylabda-8(17),13-dien-18-oic acid (2), along with one known labdane-type diterpene, 7,13E-labdadien-15-ol (3). Their structures were determined by analysis of spectroscopic data and comparison with the data of known analogues.
authors.forename: Chi-I
authors.initials: CI
authors.lastname: Chang
authors.forename: Yen-Cheng
authors.initials: YC
authors.lastname: Li
authors.forename: Che-Yi
authors.initials: CY
authors.lastname: Chao
authors.forename: Sheng-Yang
authors.initials: SY
authors.lastname: Wang
authors.forename: Hsun-Shuo
authors.initials: HS
authors.lastname: Chang
authors.forename: Louis Kuoping
authors.initials: LK
authors.lastname: Chao
authors.forename: Chang Syun
authors.initials: CS
authors.lastname: Yang
authors.forename: Yueh-Hsiung
authors.initials: YH
authors.lastname: Kuo
mesh_terms: D032486:Cunninghamia / Q000737:chemistry*; D004224:Diterpenes / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D010936:Plant Extracts / Q000737:chemistry*; D014934:Wood / Q000737:chemistry*
chemical_list: D004224:Diterpenes; D010936:Plant Extracts