New Cytotoxic Aristolactams from Pararistolochia flos-avis

New Cytotoxic Aristolactams from Pararistolochia flos-avis Aristolactams and further constituents from Aristolochia chamissonis Aristolactams, 1-(2-C-Methyl-β-D-ribofuranosyl)-uracil and Other Bioactive Constituents of Toussaintia orientalis Aristolochic acids and aristolactams from Aristolochia auricularia Constituents from the Stem and Root of Aristolochia kaempferi. Aristolochic acids, aristolactam alkaloids and amides from Aristolochia kankauensis Synthesis of aristolactam analogues and evaluation of their antitumor activity Sesquiterpene Esters of Aristolochic Acid from the Root and Stem of <i>Aristolochia</i> <i>heterophylla</i> Sesquiterpene Esters of Aristolochic Acid from the Root and Stem of <i>Aristolochia</i> <i>heterophylla</i> he Constituents of the Root and Stem of Aristolochia cucurbitlfolia Hayata and Their Biological Activity.