title: Two limonoids, khayalenoids A and B with an unprecedented 8-oxa-tricyclo[4.3.2.0(2,7)]undecane motif, from Khaya senegalensis.
abstract: Two limonoids, namely khayalenoids A (1) and B (2) with an unprecedented 8-oxa-tricyclo[4.3.2.0(2,7)]undecane motif in the nortriterpenoid core, were isolated from the stems of Khaya senegalensis. Their structures with absolute configuration were determined by spectroscopic data, X-ray crystallography, and CD analysis.
authors.affiliation: State Key Laboratory of Drug Research, Institute of Materia Medica, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 555 Zuchongzhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, People's Republic of China.
authors.forename: Tao
authors.initials: T
authors.lastname: Yuan
authors.forename: Sheng-Ping
authors.initials: SP
authors.lastname: Yang
authors.forename: Chuan-Rui
authors.initials: CR
authors.lastname: Zhang
authors.forename: Sheng
authors.initials: S
authors.lastname: Zhang
authors.forename: Jian-Min
authors.initials: JM
authors.lastname: Yue
mesh_terms: D002942:Circular Dichroism; D018360:Crystallography, X-Ray; D036701:Limonins / Q000737:chemistry* / Q000302:isolation & purification*; D029582:Meliaceae / Q000737:chemistry*; D008968:Molecular Conformation; D015394:Molecular Structure; D018547:Plant Stems / Q000737:chemistry
chemical_list: D036701:Limonins; C535200:khayalenoid A; C535201:khayalenoid B