Usama Shaheen

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This paper reports the computational evaluation and experimental verification of 7-hydroxy-3-(1-phenyl-3-aryl-1H-pyrazol-5-yl)-4H-chromen-4-ones 3 and their o-β-d-glucopyranosides 5 for their antimicrobial and antioxidant activity. The prepared compounds were tested against various Gram-positive and Gram-negative bacteria species. Some of the synthesized(More)
The novel N-1 and C5 alkyl substituted derivatives of pyrimidine were synthesized by using tetrabutyl ammonium bromide (TBAB) as phase transfer catalyst at 20-25 °C with excellent productivity (85-95%). The new compounds were evaluated for their antibacterial activities by screening them against Gram-positive and Gram-negative bacterial strain:(More)
In the present contribution, we have used petra, osiris and molinspiration (POM) analyses to identify pharmacophores and anti-pharmacophores for antibacterial/antifungal activity of some benzothiophene derivatives (THBT). Lipophilicity and presence of tautomerism processes were the major factors that governed the orientation to antibacterial and/or(More)
In this work, a new and efficient strategy to identify pharmacophores and anti-pharmacophores sites in thienopyrimidinone derivatives for antibacterial/antifungal activity using Petra, Osiris and Molinspiration (POM) analyses is described. We carried out receptor based electrostatic analysis to confirm the electronic, steric and hydrophobic requirements for(More)
BACKGROUND Inula viscosa L. (Asteraceae) is a medicinal plant widely used as a folk medicine in oriental Morocco, to treat hypertension. The antihypertensive effect of the methanolic extract obtained from I. viscosa leaves was evaluated in hypertensive L-NAME rats. Systolic blood pressure (SBP) was measured using a non-invasive indirect tail-cuff(More)
BACKGROUND Sucrase enzyme inhibitor considered as an oral anti-diabetic therapy that delays the absorption of eaten carbohydrates, reducing the postprandial glucose and insulin peaks to reach normoglycemia. MATERIALS AND METHODS Chromatographic fractionation of the hydroalcoholic extract of leaves of Azadirachta indica growing in KSA, followed by in-vitro(More)
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