Anti-Helicobacter pylori compounds from Santalum album.
Six new sesquiterpenes, (Z)-2beta-hydroxy-14-hydro-beta-santalol (1), (Z)-2alpha-hydroxy-albumol (2), 2R-(Z)-campherene-2,13-diol (3), (Z)-campherene-2beta,13-diol (4), (Z)-7-hydroxynuciferol (5), and (Z)-1beta-hydroxy-2-hydrolanceol (6), together with five known compounds, (Z)-alpha-santalol (7), (Z)-beta-santalol (8), (Z)-lanceol (9), alpha-santaldiol (10), and beta-santaldiol (11), were isolated from Santalum album, by using bioassay-guided fractionation for Helicobacter pylori. The structures were determined by extensive NMR studies. The absolute configuration of compound 3 was determined by a modified Mosher method. The crude extracts as well as the isolated compounds showed antibacterial activity against H. pylori. Especially, compounds 7 and 8 have strong anti-H. pylori activities against a clarithromycin-resistant strain (TS281) as well as other strains.
Graduate School of Pharmaceutical Sciences, University of Tokushima, Japan.
Toshimasa
T
Ochi
Hirofumi
H
Shibata
Tomihiko
T
Higuti
Ko-hei
KH
Kodama
Takenori
T
Kusumi
Yoshihisa
Y
Takaishi
D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D017291:Clarithromycin / Q000494:pharmacology; D024881:Drug Resistance, Bacterial; D016480:Helicobacter pylori / Q000187:drug effects*; D007564:Japan; D008826:Microbial Sensitivity Tests; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010946:Plants, Medicinal / Q000737:chemistry*; D032123:Santalum / Q000737:chemistry*; D012717:Sesquiterpenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D013237:Stereoisomerism
D000900:Anti-Bacterial Agents; D012717:Sesquiterpenes; D017291:Clarithromycin