Withanolides from Jaborosa kurtzii
Natalia S Ramacciotti1, Viviana E Nicotra
1Departamento de Química Orgánica and Instituto Multidisciplinario de Biología Vegetal (IMBIV-CONICET), Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciencias Químicas II, Ciudad Universitaria, Córdoba CP 5000, Argentina.
Abstract:
Two new withanolides were isolated and characterized from the aerial parts of Jaborosa kurtzii, namely, jaborosalactone 43 (1), with a spiranoid delta-lactone at C-22, and jaborosalactone 44 (2), a 12-oxowithanolide, which may function as a biosynthetic precursor to 1. These new compounds were fully characterized by a combination of spectroscopic methods. Compound 1 showed selective phytotoxicity toward a dicotyledon species, Lactuca sativa (lettuce).
Related Concept Videos
Anthelminthic Agents
Drugs Affecting GI Tract Motility: Adsorbents as Antidiarrheal Agents
Adsorbents...
Drugs Affecting GI Tract Motility: Other Laxatives
Osmotic or saline laxatives, like magnesium hydroxide or milk of...
Anxiolytic Drugs: Overview
Primary Types of Anxiolytic Drugs
1. Benzodiazepines:
Benzodiazepines bind to the GABA-A receptor in the brain, enhancing GABA's interaction. This action reduces neurotransmission, effectively blocking anxiety-associated limbic circuitry.
Drugs for Treatment of Constipation-Predominant IBS
Drugs Affecting GI Tract Motility: Bulk-Forming and Stimulant Laxatives
Bulk-forming laxatives, such as psyllium, methylcellulose, and polycarbophil, absorb water in the intestine, increasing stool bulk and promoting bowel movement. This makes...
