Occurrence of the insecticidal 16,17-didehydro-16(E)-stemofoline in Stemona collinsae

Occurrence of the insecticidal 16,17-didehydro-16(E)-stemofoline in Stemona collinsae Feeding Deterrence and Contact Toxicity of Stemona AlkaloidsA Source of Potent Natural Insecticides Stemospironine, a New Insecticidal Alkaloid ofStemona japonicaMiq. Isolation, Structural Determination and Activity Stemospironine, a new insecticidal alkaloid of Stemona japonica Miq. isolation, structural determination and activity. Alkaloids from Stems and Leaves of<i>Stemona japonica</i>and Their Insecticidal Activities Alkaloids from Stems and Leaves of<i>Stemona japonica</i>and Their Insecticidal Activities Alkaloids from the Roots of <i>Stemona aphylla</i> Alkaloids from the Roots of <i>Stemona aphylla</i> Phytochemical Studies on <i>Stemona </i>Plants:  Isolation of Stemofoline Alkaloids Phytochemical Studies on Stemona Plants:  Isolation of Stemofoline Alkaloids