title: Labdane diterpenes from the seeds of Platycladus orientalis.
abstract: Two new labdane diterpenes, 14(R),15-dihydroxy-8(17),12(E)-labdadien-19-oic acid (1) and 16-methyl-12,15-epoxy-8(17),13-labdadien-19-oic acid (2), together with four known compounds, were isolated from the seeds of Platycladus orientalis. Their structures were established by spectroscopic methods. The stereochemistry of compound 1 was defined by X-ray crystallographic analysis.
authors.affiliation: Graduate School of Chinese Academy of Sciences, Shanghai, 200031, China.
authors.forename: X-Y
authors.initials: XY
authors.lastname: Ren
authors.forename: Y
authors.initials: Y
authors.lastname: Ye
mesh_terms: D002681:China; D018360:Crystallography, X-Ray; D029779:Cupressaceae / Q000737:chemistry*; D004224:Diterpenes / Q000737:chemistry* / Q000302:isolation & purification; D015394:Molecular Structure; D010946:Plants, Medicinal / Q000737:chemistry*; D012639:Seeds / Q000737:chemistry*; D013057:Spectrum Analysis
chemical_list: C517903:14(R),15-dihydroxy-8(17),12(E)-labdadien-19-oic acid; C517904:16-methyl-12,15-epoxy-8(17),13-labdadien-19-oic acid; D004224:Diterpenes