title: A new chromone from Hymenocallis littoralis Salisb. (Amaryllidaceae).
abstract: A new chromone, 5,7-dihydroxy-6,8-dimethoxy-2-methyl-4H-chromen-4-one (1), together with seven known compounds, 5,7-dihydroxy-6-methoxy-2-methyl-4H-chromen-4-one (pisonin B) (2), 5,7-dihydroxy-2-methyl-4H-chromen-4-one (noreugenin) (3), 5-hydroxy-7-methoxy-2-methyl-4H-chromen-4-one (eugenin) (4), (2S)-7,4'-dihydroxyflavan (5), 3',7-dihydroxy-4'-methoxy-8-methylflavan (6), 3',7-dihydroxy-4'-methoxyflavan (7) and 6,8-dimethyl-5,7,4'-trihydroxyflavanone (( - )-farrerol) (8), were isolated from Hymenocallis littoralis Salisb. (Amaryllidaceae) growing in Vietnam. Their structures were determined based on spectroscopic and physicochemical analyses.
authors.affiliation: a School of Chemical Engineering, Hanoi University of Science and Technology , 01 Dai Co Viet Street, Hanoi , Vietnam.
authors.forename: Dinh Thi Phuong
authors.initials: DT
authors.lastname: Anh
authors.forename: Tran Bach
authors.initials: TB
authors.lastname: Duong
authors.forename: Vu Dinh
authors.initials: VD
authors.lastname: Hoang
mesh_terms: D002867:Chromones / Q000737:chemistry / Q000302:isolation & purification*; D019668:Liliaceae / Q000737:chemistry*; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D014744:Vietnam
chemical_list: C000594408:5,7-dihydroxy-6,8-dimethoxy-2-methyl-4H-chromen-4-one; D002867:Chromones
keywords: Amaryllidaceae; Hymenocallis littoralis; chromone; flavonoid