Withanolides from the genus Exodeconus (Solanaceae). Chemotaxonomical Considerations

FÁTIMA GUTIÉRREZ NICOLÁS; CARINA N. CASERO; ADRIANA DEL VALLE PACCIARONI; SEGUNDO LEIVA GONZÁLES ; GLORIA E. BARBOZA; VIVIANA E. NICOTRA

STEROIDS

ELSEVIER SCIENCE INC

Lugar: Amsterdam; Año: 2020 vol. 162 p. 1 - 1

0039-128X

ive Exodeconus species were phytochemically analyzed. From the aerial parts of E. pusillus, the 7α,27-dihy-droxy-1-oxo-22R-witha-2,5,24-trienolide and three other previously unreported normal-type withanolides wereisolated. All the studied species had normal type and/or ring-D aromatic withanolides, and some had alreadybeen isolated from other Solanaceae genera, and therefore, these compounds are not chemotaxonomic markersat the generic level. The chemical composition of an undescribed Exodeconus species analyzed here supports thedesignation of this taxon as a new entity. The integral chemical profile of Exodeconus can be evaluated for itstaxonomic implication when a more robust phylogeny of Solanaceae is available that allows the phylogeneticrelationships with its closest genera to be clarified.