Surface properties of new virginiamycin M1 derivatives

Surface properties of new virginiamycin M(1) derivatives.

Three kinds of derivatives of the M(1) factor of virginiamycin have been synthesised: esters with long chain fatty acids, oximes with modified polar amino acids and bis-derivatives with both the ester and oxime function. The study of the surface tension time dependence of M(1) and its derivatives has shown that it is necessary to enhance simultaneously the hydrophobicity and the hydrophilicity ...

Preparation and properties of derivatives of virginiamycin S.

Reduction of virginiamycin S with sodium borohydride produces allo- and normal-dihydro-virginiamycin S. Reduction of the tosylhydrazone of virginiamycin S with sodium cyanoborohydride affords deoxyvirginiamycin S. These compounds are less active than virginiamycin S. Like virginiamycin S they enhance the activity of virginiamycin M1.

Synthesis and Properties of New Dihydroquercetin Derivatives

This paper is to analyze the latest data on synthesis, structure, chemical and biological properties of flavonoid dihydroquercetin (taxifolin). Complexes including DHQ (dihydroquercetin) into cyclodextrins were obtained. These supramolecular representatives are characterized by high water-solubility, good permeability through biomembranes, prolonged action in the organism and stability while be...

EVALUATION OF ANTIOXIDANT AND ANTIFUNGAL PROPERTIES OF NEW DERIVATIVES OF PERAZOLO [3,4-D]PYRIMIDINE

Background & Aims: Heterocyclic compounds are found be abundant in nature, these compounds have many biological properties, and many drugs also contain heterocyclic rings. In this study, antioxidant and anti-fungal properties of the seven pyrazolo[3,4-d]pyrimidine compounds has been studied that synthesized in Iran and their good antibacterial properties have been reported Materials & Methods:...

A new species of Streptomyces producing virginiamycin family antibiotics.