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Molecular Structure

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Accurate analysis of parabens in human urine using isotope-dilution ultrahigh-performance liquid chromatography-high resolution mass spectrometry.

Journal of pharmaceutical and biomedical analysis
An analytical method that utilizes isotope-dilution ultrahigh-performance liquid chromatography coupled with hybrid quadrupole time-of-flight mass spectrometry (UHPLC-QTOF-MS or called UHPLC-HRMS) was developed, and validated to be highly precise and...

Antiviral activity of aconite alkaloids from Debx.

Natural product research
Four diterpenoid alkaloids, namely, () hypaconitine, ) songorine, () mesaconitine and () aconitine, were isolated from the ethanol root extract of Debx. The antiviral activities of these alkaloids against tobacco mosaic virus (TMV) and cucumber mosa...

Antimicrobial Furoquinoline Alkaloids from Vepris lecomteana (Pierre) Cheek & T. Heller (Rutaceae).

Molecules (Basel, Switzerland)
Three new prenylated furoquinoline alkaloids named lecomtequinoline A (), B (), and C (), together with the known compounds anhydroevoxine (), evoxine (), dictamnine (), methylflindersine (), evoxanthine (), hesperidin, lupeol, -sitosterol, stigmaste...

Cytotoxicity of the Defensive Secretion from the Medicinal Insect Blaps rynchopetera.

Molecules (Basel, Switzerland)
Fairmaire has long been used as a folk medicine by the Yi and Bai ethnic groups in China to treat fever, cough, gastritis, boils, and tumors. In the present study, the cytotoxicity of the defensive secretion (TDS) of against AGS Caco-2, HepG2 U251 ...

Structures and antipathogenic fungi activities of flavonoids from pathogen-infected Astragalus adsurgens.

Natural product research
Healthy Astragalus adsurgens is a highly palatable forage widely cultivated in arid areas of north China, while pathogen- (Embellisia asttrgali ) infected A. adsurgens is poisonous forage and often causes disastrous livestock losses. A phytochemical ...

Two new bis-iridoids isolated from Scabiosa stellata and their antibacterial, antioxidant, anti-tyrosinase and cytotoxic activities.

Fitoterapia
This study presents the chemical profile investigation of a 70% ethanol extract obtained from Scabiosa stellata, a medicinal herbaceous traditionally used to treat heel cracks. A C NMR-based dereplication methodology was firstly applied on centrifuga...

Selenazolinium Salts as "Small Molecule Catalysts" with High Potency against ESKAPE Bacterial Pathogens.

Molecules (Basel, Switzerland)
In view of the pressing need to identify new antibacterial agents able to combat multidrug-resistant bacteria, we investigated a series of fused selenazolinium derivatives (-) regarding their in vitro antimicrobial activities against 25 ESKAPE-pathog...

4D Printed Actuators with Soft-Robotic Functions.

Macromolecular rapid communications
Soft matter elements undergoing programed, reversible shape change can contribute to fundamental advance in areas such as optics, medicine, microfluidics, and robotics. Crosslinked liquid crystalline polymers have demonstrated huge potential to imple...

In silico toxicity profiling of natural product compound libraries from African flora with anti-malarial and anti-HIV properties.

Computational biology and chemistry
This paper describes an analysis of the diversity and chemical toxicity assessment of three chemical libraries of compounds from African flora (the p-ANAPL, AfroMalariaDb, and Afro-HIV), respectively containing compounds exhibiting activities against...