CHEN Ruolan,LI Ziyang,WU Huizhen,et al.The metabolites of a mangrove endophytic fungus Pseudallescheria boydii L32[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2022,61(04):60-64.
CHEN Ruolan,LI Ziyang,WU Huizhen,et al.The metabolites of a mangrove endophytic fungus Pseudallescheria boydii L32[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2022,61(04):60-64. DOI: 10.13471/j.cnki.acta.snus.2021C011.
The metabolites of a mangrove endophytic fungus Pseudallescheria boydii L32
A.Gray were studied. The monomeric compounds were isolated from the fermentation product by the modern chromatography technology. The structures were determined by spectral analysis. The antibacterial activity was tested via the dilution method. Ten metabolites were purified including 2,2′-oxybis(
1
,
4
)-di-tert-butylbenzene (
1
),livistone B (
2
),simplicildone A (
3
),simplicildone B (
4
),botryorhodine B (
5
),(‒)-regiolone (
6
),citreoanthrasteroid B (
7
),stigmast-4-en-3-one (
8
),succinic acid (
9
) and oxalic acid (
10
). Compounds
1
,
3
,
4
,
5
,
7
and
8
were isolated from
Pseudallescheria
sp. for the first time. Compounds
1
,
4
,
5
and
6
showed antibacterial activity against
Escherichia coli
with O6 serotype and compounds
1
and
5
showed antibacterial activity against
E.coli
with O78 serotype with MIC values of 50,12.5,25,100,100,100 μg/mL, respectively.
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