title: Xyloccensins O and P, unique 8,9,30-phragmalin ortho esters from Xylocarpus granatum.
abstract: Two unique 8,9,30-phragmalin ortho esters, xyloccensins O (1) and P (2), were isolated from the mangrove plant Xylocarpus granatum. They are a new type of ortho ester of phragmalin. The structures were determined by spectroscopic and single-crystal X-ray diffraction techniques. The biogenetic pathway to these new phragmalins was also proposed. [structure: see text]
authors.affiliation: Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou 510301, P.R. China. wwujun2003@yahoo.com
authors.forename: Jun
authors.initials: J
authors.lastname: Wu
authors.forename: Qiang
authors.initials: Q
authors.lastname: Xiao
authors.forename: Jianshe
authors.initials: J
authors.lastname: Huang
authors.forename: Zhihui
authors.initials: Z
authors.lastname: Xiao
authors.forename: Shuhua
authors.initials: S
authors.lastname: Qi
authors.forename: Qingxin
authors.initials: Q
authors.lastname: Li
authors.forename: Si
authors.initials: S
authors.lastname: Zhang
mesh_terms: D018360:Crystallography, X-Ray; D004952:Esters / Q000737:chemistry* / Q000302:isolation & purification*; D036701:Limonins; D009682:Magnetic Resonance Spectroscopy; D029582:Meliaceae / Q000737:chemistry*; D008968:Molecular Conformation; D015394:Molecular Structure; D014315:Triterpenes / Q000737:chemistry* / Q000302:isolation & purification*
chemical_list: D004952:Esters; D036701:Limonins; D014315:Triterpenes; C489298:xyloccensin O; C489299:xyloccensin P