title: Trinorcassane and cassane diterpenoids from the seeds of Caesalpinia minax.
abstract: An unprecedented trinorcassane diterpenoid and a cassane furanoditerpenoid were isolated from the seeds of Caesalpinia minax. It is the first example of dicylic cassane-type trinorditerpenoid, which is different from reported 16- or 17-norcassane diterpenoids. The structure of the compounds was elucidated on the basis of 1D and 2D NMR analysis. Biosynthesis pathways are postulated, and this pathway was supported by semi-synthesis.
authors.affiliation: State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 501 Haike Road, Zhangjiang Hi-Tech Park, Shanghai 201203, PR China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Zheng
authors.affiliation: State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 501 Haike Road, Zhangjiang Hi-Tech Park, Shanghai 201203, PR China.
authors.forename: Shu-Wei
authors.initials: SW
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 501 Haike Road, Zhangjiang Hi-Tech Park, Shanghai 201203, PR China. Electronic address: ljxuan@mail.shcnc.ac.cn.
authors.forename: Li-Jiang
authors.initials: LJ
authors.lastname: Xuan
mesh_terms: D053898:Biosynthetic Pathways; D029911:Caesalpinia / Q000737:chemistry*; D004224:Diterpenes / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D010936:Plant Extracts / Q000737:chemistry; D012639:Seeds / Q000737:chemistry*
chemical_list: D004224:Diterpenes; D010936:Plant Extracts; C000598399:trinorcassane
keywords: Caesalpinia minax Hance; Diterpenoids; Norcassane