title: Flavonoids from Cleistocalyx operculatus.
abstract: Two flavonoids 3'-formyl-4',6'-dihydroxy-2'-methoxy-5'-methylchalcone and (2S)-8-formyl-5-hydroxy-7-methoxy-6-methylflavanone together with five known compounds, were isolated from the dried buds of Cleistocalyx operculatus. Their structures were determined on the basis of spectroscopic analyses (UV, IR, EIMS, (1)H, (13)C NMR and HMBC).
authors.affiliation: State Key Laboratory of Bioreactor Engineering, Institute of Biochemistry, East China University of Science and Technology, Shanghai 200237, China.
authors.forename: Chun-Lin
authors.initials: CL
authors.lastname: Ye
authors.forename: Yan-Hua
authors.initials: YH
authors.lastname: Lu
authors.forename: Dong-Zhi
authors.initials: DZ
authors.lastname: Wei
mesh_terms: D005419:Flavonoids / Q000737:chemistry* / Q000302:isolation & purification; D035264:Flowers / Q000737:chemistry; D015394:Molecular Structure; D027822:Myrtaceae / Q000737:chemistry*; D019906:Nuclear Magnetic Resonance, Biomolecular
chemical_list: D005419:Flavonoids