title: Five new compounds from Dendrobium crystallinum.
abstract: Five new compounds, dencryol A (1), dencryol B (2), crystalltone (3), crystallinin (4), and 3-hydroxy-2-methoxy-5,6-dimethylbenzoic acid (5), together with six known compounds, dendronobilin B (6), syringic acid (7), apigenin (8), isoviolanthin (9), 6'''-glucosyl-vitexin (10), and palmarumycin JC2 (11), have been isolated from the stems of Dendrobium crystallinum, of which compounds 9-11 were isolated from the genus Dendrobium for the first time, and all the other compounds were first obtained from this plant. Their structures were established on the basis of spectroscopic analysis and literature data.
authors.affiliation: Key Laboratory of Modern Chinese Medicines, Ministry of Education, China Pharmaceutical University, Nanjing, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
authors.forename: Chao-Feng
authors.initials: CF
authors.lastname: Zhang
authors.forename: Zheng-Tao
authors.initials: ZT
authors.lastname: Wang
authors.forename: Mian
authors.initials: M
authors.lastname: Zhang
authors.forename: Luo-Shan
authors.initials: LS
authors.lastname: Xu
mesh_terms: D001565:Benzoates / Q000737:chemistry / Q000302:isolation & purification*; D001632:Bibenzyls / Q000737:chemistry / Q000302:isolation & purification*; D031667:Dendrobium / Q000737:chemistry*; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification*; D007783:Lactones / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010616:Phenanthrenes / Q000737:chemistry / Q000302:isolation & purification*; D012717:Sesquiterpenes / Q000737:chemistry / Q000302:isolation & purification*; D014966:Xanthenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D001565:Benzoates; D001632:Bibenzyls; D004365:Drugs, Chinese Herbal; D007783:Lactones; D010616:Phenanthrenes; D012717:Sesquiterpenes; D014966:Xanthenes; C547998:crystallinin; C547997:crystalltone; C547991:dencryol A; C547992:dencryol B