Sesquiterpene lactones. XXXIV. Guaianolides in the genus Leuzea DC.

Abstract

Guaianolides were found in three species of the genus Leuzea DC. Chlorojanerin, cynaropicrin and janerin were isolated from L. rhapontica subg. helenifolia (Gren, Gordon) Holub and L. rhaponticoides Graells. From L. carthamoides (Willd.) DC., chlorojanerin, cynaropicrin, janerin, cebellin E and repdiolide were obtained.

Keywords

• sesguiterpene lactones
• Leuzea
• Compositae
• chemotaxonomy