Vismione H and prenylated xanthones from vismia guineensis

Chemistry and biology of genusVismia

“…The root bark of V. guineensis, collected on the Ivory Coast, contained madagascin anthrone (71), 3-[(3,7-dimethyl-2,6-octadienyl)oxy]-1,8-dihydroxy-6-methyl-anthracenone (72), 5,9,10-trihydroxy-8-methoxy-2,2-dimethyl-12-(3-methyl-2-butenyl)-2H,6H-pyrano[3,2-b]xanthen-6-one (73), xanthone V1a (74), 1,3,5,6-tetrahydroxy-7-methoxy-2,4-bis(3-methyl-2-butenyl)-xanthone (75), vismione H (76), and 5,9,10-tris(acetyloxy)-2,2-dimethyl-12-(3-methyl-2-butenyl)-2H,6H-pyrano[3,2-b]xanthen-6-one (77) (Botta et al, 1986)- (Figure 7). …”

“…Dehydrodianthrone (66) V. magnoliaefolia Nagem & Alves, 1995 Betulinic acid (67) V. magnoliaefolia Nagem & Alves, 1995 Dammaradienol (68) V. magnoliaefolia Nagem & Alves, 1995 Taxifolin 3-O-rhamnoside (69) V. micrantha Nagem & Ferreira, 1993 1,1′,8,8′-Tetrahydroxy-3,3′-dimethyl-6,6′-dimethoxy-7,7′-(trans-3-methyl-1-butenyl)-10,10′-bianthrone (70) V. martiana Nagem & Faria, 1990 Madagascin anthrone (71) V. guineensis Botta et al, 1986 3-[(3,7-Dimethyl-2,6-octadienyl)oxy]-1,8-dihydroxy-6-methyl-anthracenone (72), V. guineensis Botta et al, 1986 5,9,10-Trihydroxy-8-methoxy-2,2-dimethyl-12-(3-methyl-2-butenyl)-2H,6H-pyrano [3,2-b]xanthen-6-one (73) V. guineensis Botta et al, 1986 Xanthone V1a (74) V. guineensis Botta et al, 1986 1,3,5,6-Tetrahydroxy-7-methoxy-2,4-bis(3-methyl-2-butenyl)-xanthone (75), V. guineensis Botta et al, 1986 Vismione H (76) V. guineensis Botta et al, 1986 9,10-Tris(acetyloxy)-2,2-dimethyl-12-(3-methyl-2-butenyl)-2H,6H-pyrano[3,2-b] xanthen-6-one (77) V. guineensis Botta et al, 1986 Acetylvismione B (78) V. japurensis Pinheiro et al, 1984 γ-Hydroxyanthrone B (79) V. japurensis Pinheiro et al, 1984 trans-α-Farnesene (80) V. japurensis Pinheiro et al, 1984 1,6,8-Trihydroxy-3-methyl-2,4,5-tris(3-methyl-2-butenyl)-anthraquinone (81) V. japurensis Pinheiro et al, 1984 cis-γ-Hydroxyferruginin A (82) V. mexicana Pinheiro et al, 1984 1,6,8-Trihydroxy-4-(4-hydroxy-3-methyl-2-butenyl)-3-methyl-2,5-bis (3-methyl-2-butenyl)-anthraquinone (83) V. mexicana Pinheiro et al, 1984 V. baccifera Ferrari et al, 1979 l-α-Curcumene (113) V. baccifera Ferrari et al, 1979 β-Eudesmene (114) V. baccifera Ferrari et al, 1979 β-Curcumene (115) V. baccifera Ferrari et al, 1979 (Continued) …”

Xanthone and Benzophenone Glycosides from the Stems of Cratoxylum formosum ssp. pruniflorum

“…Other known compounds were identified as cochinchinone G (5), 15) 5-O-methyl-2-deprenylrheediaxanthone B (6), 16) isocudraniaxanthone A (7), 17) isocudraniaxanthone B (8), 17) garcinone B (9), 18) xanthone V 1 (10), 19) by comparison of their physical and spectroscopic data with those reported previously.…”

“…Its molecular formula was established as C 19 7), which was the characteristic of the carbonyl group of a benzophenone derivative. 13,14) The aromatic proton signals at d 7.33 and 7.30 were assigned as H-2 and H-6, respectively, based on their HMBC correlations with the carbonyl carbon (C-7) ( (Fig.…”

Prenylated Anthraquinones and Other Constituents from the Seeds of Vismia laurentii

“…The powder (200 g, dry weight) was exhaustively extracted with CH 2 Cl 2 /MeOH (1/1; v/v) and the extract was separated by chromatography on silica gel, affording the new compounds laurenquinone A (1, 38.0 mg) and B (2, 20.0 mg) together with the known compounds xanthone V 1 (3), 5) physcion (4), 6) 3-geranyloxyemodin anthrone (5), 5) and friedelin (6). 7) Their structures were elucidated by 1D and 2D NMR spectroscopy and by comparison with spectroscopic data reported in the literature.…”