new chalcone, xanthones, and a xanthonolignoid from Hypericum geminiflorum

• Published in: Journal of natural products (Washington, D.C.) Vol. 62; no. 7; pp. 1033 - 1035
• Main Authors: Chung, M.I, Weng, J.R, Lai, M.H, Yen, M.H, Lin, C.N
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 01-07-1999; Glendale, AZ American Society of Pharmacognosy
• Subjects: 4-hydroxy-1,2-dimethoxyxanthone; 6,7-dihydroxy-1,3-dimethoxyxanthone; Analytical, structural and metabolic biochemistry; Aromatic and heterocyclic compounds; Biological and medical sciences; Carbohydrate Sequence; Chalcone - analogs & derivatives; Chalcone - chemistry; Chalcone - isolation & purification; chalcones; chemical constituents of plants; Chemical constitution; chemical structure; China; Ericales - chemistry; Fundamental and applied biological sciences. Psychology; gemichalcone; gemixanthone; heartwood; Heterocyclic compounds, pigments; Hypericum; leaves; lignans; Magnetic Resonance Spectroscopy; Molecular Sequence Data; Other biological molecules; Plant Leaves - chemistry; Plant physiology and development; Plant Stems - chemistry; roots; spectral analysis; Spectrometry, Mass, Fast Atom Bombardment; Spectrophotometry, Ultraviolet; stems; Terpenes - chemistry; Terpenes - isolation & purification; Xanthenes - chemistry; Xanthenes - isolation & purification; Xanthones; Taiwan; Root; Heartwood; Guttiferae; Tetracyclic compound; Tricyclic compound; Oxygen heterocycle; Diphenols; Ketophenols; Dicotyledones; Angiospermae; Plant origin; Phenols; Benzenic compound; Isolation; Spermatophyta; Aromatic compound; Enone; Structural analysis
• ISSN: 0163-3864; 1520-6025
• DOI: 10.1021/np980533+

A new prenyl chalcone, gemichalcone C (1), was isolated from the heartwood and root of Hypericum geminiflorum. Three new xanthones-6, 7-dihyroxy-1,3-dimethoxyxanthone (2), 4-hydroxy-1, 2-dimethoxyxanthone (3), and gemixanthone A (4)-and four known xanthones were isolated from the leaves and stems of the same plant.