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Analysis of C-glycosyl flavonoids from South American Passiflora species by HPLC-DAD and HPLC-MS.
The methods established are simple and can be used as a tool for the characterisation and quality control of pharmaceutical preparations containing these Passiflora extracts.
Cytotoxic and Antimicrobial Activity of Pseudopterosins and seco-Pseudopterosins Isolated from the Octocoral Pseudopterogorgia elisabethae of San Andrés and Providencia Islands (Southwest Caribbean
The anti-microbial profile against four pathogenic microorganisms and the cytotoxic profiles against five human cells lines are reported, where PsQ and PsG were the most active compounds (GI50 values between 5.8 μM to 12.0 μM) and the compounds showed good and selective activity against the Gram-positive bacteria and yeast.
Bacterial Communities of the Gorgonian Octocoral Pseudopterogorgia elisabethae
This work has characterized the composition of the bacterial community associated with P. elisabethae collected from Providencia Island, Colombia, using both culture-dependent and culture-independent approaches, and it is revealed that conventional culturing techniques failed to culture the majority of octocoral-associated bacterial diversity.
Cembranoid diterpenes from the Caribbean sea whip Eunicea knighti.
Three new cembranoid diterpenes, knightol, knightal, and knightal were isolated as major compounds from the sea whip Eunicea knighti collected from the Colombian Caribbean and showed significant antimicrobial activity against bacterial isolates and excellent anti-QS inhibition activity measured by means of bioluminescence inhibition with biosensor model systems.
Chemical constituents from the Colombian medicinal plant Maytenus laevis.
The methanol extract of the bark of the Colombian medicinal plant Maytenus laevis gave six new compounds and 28 known compounds, and canophyllol demonstrated the most effective induction of the cytokines.
Isolation and synthesis of (-)-(5S)-2-imino-1-methylpyrrolidine-5- carboxylic acid from Cliona tenuis: structure revision of pyrostatins.
Comparison of NMR spectral data strongly suggests that pyrostatins A and B are identical to 5-hydroxyectoine and ectoine, respectively.