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Dibenzo-α-pyrones from the endophytic fungus Alternaria sp. Samif01: isolation, structure elucidation, and their antibacterial and antioxidant activities
TLDR
Samif01, an endophytic fungus obtained from Salvia miltiorrhiza Bunge, showed antibacterial activity against several tested bacterial pathogens and produced seven bioactive dibenzo-α-pyrones, including one new compound, whose absolute configuration was determined by ECD calculation.
Bioactive Dibenzo-α-pyrone Derivatives from the Endophytic Fungus Rhizopycnis vagum Nitaf22.
TLDR
Six new dibenzo-α-pyrones, rhizopycnolides A (1) and B (2), together with eight known congeners (7-14), were isolated from the endophytic fungus Rhizopycnis vagum Nitaf22 obtained from Nicotiana tabacum and were unambiguously elucidated using NMR, HRESIMS, TDDFT ECD calculation, and X-ray crystallography data.
Hepatoprotective prenylaromadendrane-type diterpenes from the gum resin of Boswellia carterii.
TLDR
Nine new prenylaromadendrane-type diterpenes, boscartols A-I (1-9) showed moderate hepatoprotective activity against d-galactosamine-induced HL-7702 cell damage.
Bioactive bis-naphtho-γ-pyrones from rice false Smut pathogen Ustilaginoidea virens.
TLDR
The structures of the new compounds were elucidated by using (1D, 2D) NMR, high-resolution mass spectrometry, UV, and circular dichroism, as well as by comparison with the literature data, and a plausible biosynthesis pathway was proposed.
Design, synthesis and potent cytotoxic activity of novel podophyllotoxin derivatives.
The effect of ultrasound on lipase-catalyzed regioselective acylation of mangiferin in non-aqueous solvents
TLDR
A simple and efficient method for regioselective acylation of mangiferin catalyzed by lipase under ultrasound irradiation is reported, with main advantages are shorter reaction time and higher yields.
New Cyclohexadepsipeptides from an Entomogenous Fungus Fusarium proliferatum and Their Cytotoxicity and Autophagy‐Inducing Activity
TLDR
Beauvenniatin F (11) exhibited strong cytotoxicity against K562/A (adriamycin‐resistant K562) with IC50 value of 3.78 μm, and also autophagy‐inducing activity at the concentration of 20 μm in GFP‐LC3 stable HeLa cells.
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