title: A Novel Norclerodane Diterpenoid from the Roots of Croton crassifolius.
abstract: A chemical investigation of Croton crassifolius afforded a novel norclerodane diterpenoid (1) with an unprecedented six-membered oxygen ring between C-1 and C-12, together with three known compounds. The structure of the new compound was elucidated based on spectroscopic (IR, 1D, and 2D NMR) and HR-ESI-MS techniques. This report describes the first example of a natural norclerodane with a 4H-chromene ring system.
authors.forename: Zhan-Xin
authors.initials: ZX
authors.lastname: Zhang
authors.forename: Hui-Hong
authors.initials: HH
authors.lastname: Li
authors.forename: Gai-Xia
authors.initials: GX
authors.lastname: Fan
authors.forename: Zheng-Yu
authors.initials: ZY
authors.lastname: Li
authors.forename: Le-Le
authors.initials: LL
authors.lastname: Dong
authors.forename: Hong-Yu
authors.initials: HY
authors.lastname: Li
authors.forename: Dong-Qing
authors.initials: DQ
authors.lastname: Fei
mesh_terms: D029802:Croton / Q000737:chemistry*; D004224:Diterpenes / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D010936:Plant Extracts / Q000737:chemistry* / Q000302:isolation & purification; D018517:Plant Roots / Q000737:chemistry; D021241:Spectrometry, Mass, Electrospray Ionization
chemical_list: D004224:Diterpenes; D010936:Plant Extracts