Chemical constituents of the culture broth of Dentipellis fragilis and their anti-inflammatory activities

Bioactive secondary metabolites from Dentipellis fragilis with anti-inflammatory and cytotoxic activity

Two new compounds, a benzofuran derivative (1) and a benzoate derivative (2), along with four known γ-pyrones (3-6), were isolated from the culture broth of Dentipellis fragilis. Their chemical structures were elucidated via spectroscopic analysis. The anti-inflammatory and cytotoxic effects of these compounds were assessed. Compound 4 exhibited significant anti-inflammatory activity, inhibiting approximately 60 % of NO production at 0.005 μM without cytotoxic effects. Additionally, compound 2 showed moderate cytotoxicity against HCT-116 and Mia Paca-2 human cancer cells, with IC50 values.

Dentifragilones A-B and Other Benzoic Acid Derivatives from the European Basidiomycete Dentipellis fragilis

A chemical and biological exploration of the European polypore Dentipellis fragilis afforded two previously undescribed natural products (1 and 2), together with three known derivatives (3-5). Chemical structures of the isolated compounds were confirmed through 1D/2D NMR spectroscopic analyses, mass spectrometry, and by comparison with the reported literature. The relative and absolute configurations of 1 were determined according to the ROESY spectrum and time-dependent density functional theory electronic circular dichroism (TDDFT-ECD), respectively. Furthermore, the absolute configuration of dentipellinol (3) was revisited and revealed to be of (R) configuration. All the isolated compounds were assessed for their cytotoxic and antimicrobial activities, with some being revealed to have weak to moderate antimicrobial activity, particularly against Gram-positive bacteria.

Three new phthalide derivatives from culture broth of Dentipellis fragilis and their cytotoxic activities

Three new phthalide derivatives (1‒3) together with two known compounds, erinaceolactone B (4) and hericerin III (5), were isolated from the culture broth of Dentipellis fragilis. The chemical structures of 1‒5 were determined by analyses of their 1D-, 2D-NMR, and MS. The absolute configuration of 1 was determined by CD analysis. The isolated compounds were assessed for their cytotoxic activities against A549, DU145, HCT116, and HT1080 cancer cell lines. Compounds 1‒5 showed strong cytotoxic activities against DU145, with IC50 values ranging from 14.3 to 16.1 µM. Additionally, all compounds showed moderate or weak cytotoxic activities against all cell lines except for compounds 4 and 1 which showed no cytotoxic activities against A549 and HCT116 cancer cell lines, respectively. Against HT1080 cancer cell line, only compound 2 displayed moderate cytotoxic activity.