A new hydronaphthalenone from the mangrove-derived Daldinia eschscholtzii PSU-STD57.

One new hydronaphthalenone derivative (1) was isolated from the broth extract of the endophytic fungus Daldinia eschscholtzii PSU-STD57 together with five known compounds, isosclerone (2), 8-methoxy-1-naphthol, 1,8-dimethoxynaphthalene, 2,6-dihydroxyphenyl-1-butan-1-one and tyrosol. The structures were assigned by spectroscopic methods. All the compounds were tested for antimicrobial activity against Staphylococcus aureus, methicillin-resistant S.

Mechanisms of 1-hydroxy-2-hydroxymethylanthraquinone from Coptosapelta flavescens as an anti-giardial activity.

Thai medicinal plants represent a rich source of potential anti-parasitic compounds. 1-hydroxy-2-hydroxymethylanthraquinone (CFQ) purified from Coptosapelta flavescens, a plant commonly used to expel intestinal worms, indicated potential anti-giardial agent as shown in a previous study. This study aims to investigate its mechanism of action.

Anthraquinone and naphthoquinone derivatives from the roots of Coptosapelta flavescens.

Investigation of the acetone and methanol extracts of the roots of Coptosapelta flavescens using various chromatographic techniques led to the isolation of four anthraquinones (1 and 3-5) and one naphthoquinone (2). 1,4-Dimethoxy-2-methylanthraquinone (1) and 2-amino-3-methoxycarbonyl-1,4-naphthoquinone (2) are reported as natural compounds for the first time. This is the first report on the phytochemistry and biological activity of compounds from C.