rifampin has been researched along with lupeol* in 1 studies
1 other study(ies) available for rifampin and lupeol
Article | Year |
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Mycobacterium tuberculosis and cholinesterase inhibitors from Voacanga globosa.
Globospiramine (1), a new spirobisindole alkaloid possessing an Aspidosperma-Aspidosperma skeleton, together with deoxyvobtusine (2), deoxyvobtusine lactone (3), vobtusine lactone (4) and lupeol (5), were isolated and identified from Voacanga globosa through a bioassay-guided purification. The gross structure and absolute stereochemistry of 1 were established by circular dichroism spectroscopy, HR-MS and unambiguous NMR spectroscopic experiments. In addition, a new biogenetic pathway for the formation of the spiro-Aspidosperma-Aspidosperma skeleton is proposed. Alkaloid 1 showed potent antituberculosis activity against Mycobacterium tuberculosis H(37)Rv as evidenced in microplate Alamar blue assay (MIC = 4 μg/mL) and low-oxygen recovery assay (LORA (MIC = 5.2 μg/mL). The bisindole alkaloids also exhibited promising activity against acetylcholinesterase and, especially butyrylcholinesterase, with deoxyvobtusine (2) (IC(50) = 6.2 μM) as the most strongly inhibiting compound. This study extends the variety of alkaloid structural platforms which exhibit antimycobacterial and anticholinesterase activity. Topics: Acetylcholinesterase; Alkaloids; Animals; Antitubercular Agents; Butyrylcholinesterase; Cholinesterase Inhibitors; Electrophorus; Horses; Indole Alkaloids; Microbial Sensitivity Tests; Mycobacterium tuberculosis; Oxazines; Pentacyclic Triterpenes; Plant Extracts; Plant Leaves; Spiro Compounds; Structure-Activity Relationship; Voacanga; Xanthenes | 2011 |