Three new xanthones were isolated from the bark of Garcinia dioica (Guttiferae) in addition to a known xanthone, 1, 3, 6-trihydroxy-8-geranyl-7-methoxyxanthone (rubraxanthone). The structures of the three xanthones were elucidated to be 1, 3, 6-trihydroxy-8-(7-hydroxy-3, 7-dimethyl-2, 5-octadieyl)-7-methoxyxanthone, 1, 3, 6-trihydroxy-8-(6, 7-epoxy-3, 7-dimethyl-2-octenyl)-7-methoxyxanthone and 1, 3, 7-trihydroxy-2, 4-diisoprenylxanthone by the aid of spectroscopic analysis including the two dimensional NMR technique. The occurrence of xanthone with such a C10 alkyl chain is rare in naturally occurring compounds.
JPH10203977A
申请人:——
公开号:JPH10203977A
公开(公告)日:1998-08-04
10.1080/14786419.2024.2371109
作者:Zaine, Nur Fazlin Zafirah、Zamakshshari, Nor Hisam、Abd Halim, Ainaa Nadiah、Yi Mian, Vivien Jong、Ngui Sing, Ngieng
DOI:10.1080/14786419.2024.2371109
日期:——
Antibacterial Activity of Xanthones from Guttiferaeous Plants against Methicillin-resistant <i>Staphylococcus aureus</i>
Extracts of Garcinia mangostana (Guttiferae) showing inhibitory effects against the growth of S. aureus NIHJ 209p were fractionated according to guidance obtained from bioassay and some of the components with activity against methicillin-resistant Staphylococcus aureus (MRSA) were characterized. One active isolate, alpha-mangostin, a xanthone derivative, had a minimum inhibitory concentration (MIC)