Two novel phenolics from Actinomadura verrucosospora.

Two novel phenolics from Actinomadura verrucosospora.

which was homogeneous in three different TLC systems. The reddish pigment was removed by trituration with CHC13, in which the majority of the mass was insoluble. This gave analytically pure compound 1. HREI-MSestablished a molecular formula of CioH^NO^, MWof 241.0402 (calcd 241.04086). IR disclosed the presence of an amide by a carbonyl band at 1680cm"1 and NH at 3441cm"1. The UV spectrum in Me...

Prodigiosin-like pigments from Actinomadura (Nocardia) pelletieri and Actinomadura madurae.

Thirteen red strains of Actinomadura (Nocardia) pelletieri and three of A. madurae were shown to produce prodigiosin-like pigments. Both of the two major pigments which were observed on thin-layer chromatograms had R(F) values significantly greater than prodigiosin. The main pigment from A. madurae 953 was shown by mass and nuclear magnetic resonance spectroscopies to be nonylprodigiosin. The m...

Two antinematodal phenolics from Knema hookeriana, a Sumatran rainforest plant.

The activity-guided chromatographic purification of the methanol extract of Knema hookeriana, using pine wood nematodes Bursaphelenchus xylophilus has successfully led to the isolation and characterization of two phenolic antinematodal compounds with minimum effective dose (MED) of 4.5 and 20 microg/cotton ball (microg/bl.) or 0.018 and 0.073 microM/cotton ball (microM/bl.), respectively. Based...

Prodigiosin-like pigments from Actinomadura (Nocardia) pelletieri.

Phenolics from Brazilian Propolis

Propolis, or bee glue, is a complex resinous mix­ ture of plant-derived products collected and used by bees as a general purpose sealer and antibiotic in their hives. It is reported to exhibit a broad spectrum of biological activities, including antibac­ terial, antiviral, antiinflammatory, cytotoxic etc. (Marcucci, 1995). It is widely used in folk medicine and also as an ingredient in “herbal”...