1,4-Naphthoquinone Motif in the Synthesis of New Thiopyrano[2,3-]thiazoles as Potential Biologically Active Compounds.

A series of 11-substituted 3,5,10,11-tetrahydro-2-benzo[6,7]thiochromeno[2,3-][1,3]thiazole-2,5,10-triones were obtained via -Diels-Alder reaction of 5-alkyl/arylallylidene/-4-thioxo-2-thiazolidinones and 1,4-naphthoquinones. The structures of newly synthesized compounds were established by spectral data and a single-crystal X-ray diffraction analysis. According to U.

Actual prospects of using some types of larch growing in Kazakhstan in medicine.

Local plants can save natural resources and be used as a source of biologically active compounds, which can be high-quality, effective, and safe ingredients for pharmacological or chemical industries. Therefore, this study aimed to investigate the properties of two medicinal plants - the fine-scaled larch () and Siberian larch (), which are growing in the Republic of Kazakhstan. We compared the two types of larches according to botanical affiliation and species description.

Chemical Composition and Antimicrobial Activity of Subcritical CO Extract of L. (Brassicaceae).

The genus L. from Brassicaceae Burnett. family covers over 150 species with an almost cosmopolitan spread.

Corrigendum to "Phytochemical and Antioxidant Studies on a Rare Rheum cordatum Losinsk: Species from Kazakhstan".

[This corrects the article DOI: 10.1155/2019/5465463.].

Phytochemical and Antioxidant Studies on a Rare Losinsk. Species from Kazakhstan.

An optimisation of extraction towards an increased antioxidant capacity and the study on the extracts' composition by HPLC-ESI-Q-TOF-MS were performed on different organs of a rarely studied plant: Losinsk (Polygonaceae) growing in Kazakhstan. More than 20 compounds from anthraquinones and phenolics were identified in an optimised method. The plant was proven to contain a wide variety of phenolic compounds (catechins, flavonoids, and their glucosides and phenolic acids) in contrast to the anthraquinone composition, which was mainly represented by emodin and its analogues.