Three new cardenolides from the milkweeds Asclepias eriocarpa and A. Labriformis

Three new cardenolides from the milkweeds Asclepias eriocarpa and A. Labriformis Cardenolides in the latex and leaves of seven Asclepias species and Calotropis procera Cytotoxic Principles from the Formosan Milkweed, <i>Asclepias </i><i>c</i><i>urassavica</i> Cytotoxic Principles from the Formosan Milkweed, <i>Asclepias </i><i>c</i><i>urassavica</i> New Cardenolide and Acylated Lignan Glycosides from the Aerial Parts of Asclepias curassavica Cytotoxicity of cardenolides and cardenolide glycosides from Asclepias curassavica Cardenolides and a lignan from asclepias subulata Cardenolide glycosides of the asclepiadaceae. New glycosides from asclepias fruticosa and the stereochemistry of uscharin, voruscharin and calotoxin Cardenolide and Oxypregnane Glycosides from the Root of Asclepias incarnata L. Cardenolide Glycosides from <i>Pergularia tomentosa</i> and Their Proapoptotic Activity in Kaposi's Sarcoma Cells