Publications by authors named "E Cieckiewicz"

5-(2-ethylaminopropyl)benzofuran (5-EAPB) and 5,6-methylenedioxy-2-aminoindane (MDAI) are two new psychoactive substances (NPS) exhibiting MDMA-like properties. In this paper, we report the case of a 28-years old man, known as drug addict, found dead at home, with two unidentified powders next to him. External examination by the forensic pathologist was unremarkable but no autopsy was performed.

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Article Synopsis
  • Researchers isolated a new limonoid (trigilgianin) and a new phenyl alkene (epoxy gilgialkene) from the stem bark of the Harms tree, along with five known compounds, marking the first time these have been identified in this species.
  • The structures of these compounds were determined using spectral studies and comparisons with existing literature.
  • Among the isolated compounds, two demonstrated significant antileishmanial activity against the visceral leishmaniasis parasite, exhibiting low cytotoxicity, while one showed moderate activity against promastigotes.
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Objectives: The aim of the present study consisted in the isolation of flavonoids from the leaves of Bryonia alba L. and evaluation of their antioxidant activity and inhibition on peroxidase-catalysed reactions.

Methods: Flavonoids were isolated by preparative HPLC-DAD and their structures were elucidated by MS and NMR.

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Objectives: To explore the in-vitro and in-vivo antimalarial potential of caffeic acid and derivatives.

Methods: Two common phenolic acids (caffeic acid and chlorogenic acid) were evaluated for in-vitro and in-vivo antiplasmodial activity in comparison with some semi-synthetic derivatives that were synthesized. An in-vitro assay based on plasmodial lactate dehydrogenase activity, and the classical in-vivo 5-day suppressive test from Peters on an artemisinin-resistant Plasmodium berghei strain was used.

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Due to the in vitro antiplasmodial activity of leaf extracts from Vernonia fimbrillifera Less. (Asteraceae), a bioactivity-guided fractionation was carried out. Three sesquiterpene lactones were isolated, namely 8-(4'-hydroxymethacrylate)-dehydromelitensin (1), onopordopicrin (2) and 8α-[4'-hydroxymethacryloyloxy]-4-epi-sonchucarpolide (3).

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