Ancistrocyclinones A and B, unprecedented pentacyclic N,C-coupled naphthylisoquinoline alkaloids, from the Chinese liana Ancistrocladus tectorius (Organic and Biomolecular Chemistry, 2018)

(untitled) - Seupel, R; Hemberger, Y; Feineis, D; Xu, M; Seo, E; Efferth, T; Bringmann, G