Structures of stemona-amine B and stemona-lactams M–R

Structures of stemona-amine B and stemona-lactams M–R Stemona-amines C–E, new alkaloids from Stemona tuberosa Stemona-amines F and G, new alkaloids from Stemona tuberosa Chemical Studies on New Stemona Alkaloids, IV. Studies on New Alkaloids from Stemona tuberosa Absolute Structures of Stemona-Lactam S and Tuberostemospiroline, Alkaloids from &lt;i&gt;Stemona tuberosa&lt;/i&gt; Two minor alkaloids from roots of Stemona tuberosa Alkaloids from the Roots of <i>Stemona tuberosa</i> Alkaloids from the Roots of Stemona tuberosa Chemical Studies on New Stemona Alkaloids, IV. Studies on New Alkaloids from Stemona tuberosa New Stemona alkaloids from the roots of Stemona tuberosa and structural revision of stemonatuberone B