Withanolides with phytotoxic activity from Jaborosa caulescens var caulescens and Jaborosa caulescens var bipinnatifida

NICOTRA VIVIANA; GIL ROBERTO; OBERTI JUAN C.; BURTON GERARDO

JOURNAL OF NATURAL PRODUCTS

ACS

Lugar: New Orleans; Año: 2007 vol. 70 p. 808 - 808

0163-3864

p class="MsoNormal" style="MARGIN: 0cm 0cm 10pt">Seven new withanolides(1-7) were isolated from the aereal parts of Jaborosa caulescens var. caulescens and Jaborosa caulescens var bipinnatifida. Three of the new copounds are realted to jaborosalactones R; S; and T with a gama lactone side chain and hemiketal (or ketal) ring formed between a 21 hydroxyl and a 12-ketone (1-3). Compounds 1, 2, and 7 showed selective phytotoxicity toward monocotyledonous and dicotyledonous species.