title: Withanolides from Jaborosa kurtzii.
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).
authors: Departamento 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.
authors: Natalia S
authors: NS
authors: Ramacciotti
authors: Viviana E
authors: VE
authors: Nicotra
mesh_terms: D001118:Argentina; D018545:Lactuca / Q000187:drug effects; D015394:Molecular Structure; D010946:Plants, Medicinal / Q000737:chemistry*; D019657:Solanaceae / Q000737:chemistry*; D054358:Withanolides / Q000737:chemistry* / Q000302:isolation & purification* / Q000494:pharmacology
chemical_list: D054358:Withanolides; C524243:jaborosalactone 43; C524244:jaborosalactone 44