Corydines, isocorydines, and analogous aporphine alkaloids were isolated from the leaves of Aristolochia lagesiana var. intermedia, together with three bisaporphine salts (lagesianines B–D). Their structures were determined by chemical derivatizations and spectroscopic analyses. Lagesianines B and C are the first examples of N–CH2–N′ and C- 2–O–C-1′ linked dimeric aporphine alkaloids, respectively, while the monomeric units of ...
