title: A new meta-homoisoflavane from the fresh stems of dracaena cochinchinensis.
abstract: A new meta-homoisoflavane, 10,11-dihydroxydracaenone C (1), together with 7,4'-dihydroxyflavone (2), 7,4'-dihydroxyflavane (3), 4,4'-dihydroxy-2-methoxychalcone (4), 4,4'-dihydroxy-2-methoxydihydrochalcone (5), 7,4'-dihydrohomoisoflavanone (6), 7,4'-homoisoflavane (7), lophenol (8), beta-sitosterol (9), stigma-5, 22-diene-3-ol (10), 1-(4'-O-beta-D-glucopyranosyl)benzyl-ethan-2-ol (11), 3,4-dihydoxy-1-allylbenezene-4-O-alpha-L-rhamnopyranosyl-(1 --> 6)-O-beta-D-glucopyranoside (12), 1-hydroxy-3,4,5-trimethoxybenzene-1-O-alpha-L-apiopyranosyl-(1 --> 6)-O-beta-D-glucopyranoside (13), and tachioside (14) have been isolated from the fresh stems of Dracaena cochinchinensis. Their structures have been established by spectroscopic analysis, especially by 2D NMR. This is the first time compounds 11, 13, 14 have been isolated from Dracaena.
authors.affiliation: Kunming Institute of Botany, Chinese Academy of Sciences, State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming 650204, China.
authors.forename: Q-A
authors.initials: QA
authors.lastname: Zheng
authors.forename: Y-J
authors.initials: YJ
authors.lastname: Zhang
authors.forename: C-R
authors.initials: CR
authors.lastname: Yang
mesh_terms: D031409:Dracaena / Q000737:chemistry*; D005419:Flavonoids / Q000737:chemistry; D007529:Isoflavones / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D018547:Plant Stems / Q000737:chemistry; D021241:Spectrometry, Mass, Electrospray Ionization; D016339:Spectrometry, Mass, Fast Atom Bombardment; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet
chemical_list: C514727:10,11-dihydroxydracaenone C; D005419:Flavonoids; D007529:Isoflavones