4,802 Result(s)

Article

Evaluation of quantification methods to determine photodynamic action on mono- and dual-species bacterial biofilms

The effect of photodynamic inactivation (PDI) sensitized by 5,10,15,20-tetra(4-N,N,N-trimethylammoniophenyl)porphyrin (TMAP⁴⁺) on different components of mono- and dual-species biofilms of Staphylococcus aureus a...

Rocío B. Acosta, Edgardo N. Durantini… in Photochemical & Photobiological Sciences (2024)

Article

Chemical Composition and Antioxidant Activity of Essential Oil from Leaves of Stigmaphyllon blanchetii

F. A. M. H. Lopes, Y. N. L. Duarte, F. C. Medeiros Filho… in Chemistry of Natural Compounds (2024)

Article

Chemical Composition and Antimicrobial Activity of Essential Oil from the Leaves and Twigs of Knema tonkinensis

B. V. Huong, N. H. Dang, D. V. Hai, L. D. Ngoc Anh… in Chemistry of Natural Compounds (2024)

Article

New Flavonoids of the Genus Scutellaria. II. Baicalein and Wogonin Glycosides from S. baicalensis

New glycosides of baicalein (1–4) and wogonin (5 and 6) were found by studying phenolic compounds from roots of Scutellaria baicalensis Georgi (Lamiaceae) grown with treatment by 24-epibrassinolide. The new compo...

D. N. Olennikov, N. K. Chirikova in Chemistry of Natural Compounds (2024)

Article

New Acylated C,O-Glycosylflavones from Cucumis sativus

Seven new acylated C,O-glycosylflavones were isolated from leaves of Cucumis sativus L. (Cucurbitaceae) variety Gele Tros. The new compounds were isovitexin 4′-O-glucoside-2′′-O-(6′′′′-O-caffeyl)-glucoside (cucum...

D. N. Olennikov, N. I. Kashchenko in Chemistry of Natural Compounds (2024)

Article

Synthesis and Antiviral Activity of 21β-Acetyl-20β,28-Epoxy-18α,19βH-Ursane Derivatives Against Influenza H1N1 and SARS-Cov-2 Spike Pseudovirus

Allobetulin derivatives with rearranged E-ring exhibit important pharmacological properties against various viral pathogens. Basing on 3β-acetoxy-21β-acetyl-20β,28-epoxy-18α,19βH-ursane triterpenoid, obtained fro...

E. F. Khusnutdinova, Z. I. Galimova, A. V. Petrova… in Chemistry of Natural Compounds (2024)

Article

Modified Neoflavones Based on 7-Hydroxyneoflavone-6-Enamino Ketone and 7-Hydroxy-3-Hetarylbenzopyran-2- and 4-Ones Mannich Bases and Their Recyclization

The interaction of 7-hydroxyneoflavone-6-enamino ketone with 8-dialkylamino-7-hydroxy-3-hetarylbenzopyran-2- and 4-ones led to the formation of 10-methyl-4-phenyl-2H,6H-pyrano[3,2-g]-chromen-2,6-dione, which inco...

E. K. Hlibov, N. V. Gorbulenko, V. S. Moskvina… in Chemistry of Natural Compounds (2024)

Article

Photosensitizing effects and physicochemical properties of chlorophyll a derivatives with hydrophilic oligoethylene glycol fragments at the macrocycle periphery

In this work, screening studies of the cytotoxic effect of chlorins with fragments of di-, tri-, and pentaethylene glycol at the macrocycle periphery in relation to HeLa, A549, and HT29 cells were performed. It i...

D. V. Belykh, Y. I. Pylina, A. V. Kustov… in Photochemical & Photobiological Sciences (2024)

Article

New Flavonoids of the Genus Scutellaria. I. Scutellarisides I and II from S. titovii and S. catharinae

The composition of phenolic compounds from Scutellaria titovii Juz. and S. catharinae Juz. (Lamiaceae) growing in Kazakhstan was studied for the first time. A total of 26 known compounds and two new O-glycosylfla...

D. N. Olennikov, N. I. Kashchenko, N. K. Chirikova in Chemistry of Natural Compounds (2024)

Article

Water-Soluble Polysaccharides from Datura stramonium Leaves and Their Prebiotic Activity

Polysaccharide constituents including water-soluble polysaccharides, pectic substances, and hemicelluloses were isolated from Datura stramonium L. (Solanaceae) leaves. Their monosaccharide compositions were es...

A. A. Siddikova, M. M. Makhmudova, M. Kh. Malikova… in Chemistry of Natural Compounds (2024)

Article

Constituents of Tanacetopsis karataviensis

D. E. Dusmatova, R. F. Mukhamatkhanova, M. G. Levkovich… in Chemistry of Natural Compounds (2024)

Article

The effect of substituent position and solvent on thermal Z‒E isomerization of dihydroquinolylazotetrazole dyes: kinetic, thermodynamic, and spectral approaches

Kinetic and thermodynamic parameters have been investigated for the thermal Z‒E isomerization of dihydroquinolylazotetrazole dyes with alkyl substituents (Me, t-Bu, and Adm) at positions 1 (dyes 2) and 2 (dyes 3)...

Galina V. Golovina, Anton E. Egorov… in Photochemical & Photobiological Sciences (2024)

Article

Isolation, Purification, and Properties of Glycoprotein from Sheep Intestinal Mucous Membrane

A glycoprotein inhibiting the growth of colon cancer cells was isolated from sheep intestinal mucous membrane. The glycoprotein, designated IGP, was purified by a combination of ion-exchange chromatography ove...

Y. H. Wang, G. Turdu, X. M. Zhao, A. L. Hu, Z. Yang… in Chemistry of Natural Compounds (2024)

Article

Synthesis of New Amides of 3-O-acetyl-18β-H-glycyrrhetic Acid

New amides of 3-O-acetyl-18β-H-glycyrrhetic acid with several aromatic and heterocyclic amines were synthesized. The chemical structures of the synthesized compounds were elucidated by UV, IR and NMR spectroscopi...

A. Zh. Dzhuraev, R. S. Esanov, A. A. Ganiev… in Chemistry of Natural Compounds (2024)

Article

New Hybrid Cytisine Derivatives Containing a Thienopyrimidine Fragment

New cytisine-thienopyrimidine hybrid molecules were synthesized by reacting cytisine with 4-chlorothieno [2,3-d]pyrimidines in the presence of Et₃N. The solvent effect on the course of the reaction was studied. T...

A. U. Berdiev, I. S. Ortikov, K. K. Turgunov… in Chemistry of Natural Compounds (2024)

Article

Lipids and Polysaccharides from Arundo donax Growing in Uzbekistan

N. K. Yuldasheva, F. A. Kodiralieva, Sh.Kh. Ibotov… in Chemistry of Natural Compounds (2024)

Article

Composition and Antibacterial Activity of Essential Oils from Roots of Seseli condensatum

N. P. Rabdanova, Zh. A. Tykheev, V. V. Taraskin… in Chemistry of Natural Compounds (2024)

Article

New Diterpene Alkaloid from Delphinium paradoxum

The new C₂₀-diterpene hetidine-type alkaloid paradoxine was isolated from the plant Delphinium paradoxum Bunge. Its structure was determined using IR and 2D NMR spectroscopic and mass spectrometric methods.

U. Kh. Kurbanov, M. G. Levkovich, N. I. Mukarramov in Chemistry of Natural Compounds (2024)

Article

Synthesis of 1R-cis-Dibromovinyl-2,2-dimethylcyclopropanes of the Isoxazole and Pyrazole Series Based on (+)-3-Carene

New 1,3-disubstituted 2,2-dimethylcyclopropanes of the isoxazole and pyrazole series were synthesized starting from (+)-3-carene. Olefination of the reductive ozonolysis product of (+)-4-acetyl-2-carene produc...

S. V. Cojocari, S. N. Curlat, F. Z. Macaev in Chemistry of Natural Compounds (2024)