Structures based on physical and chemical methods, are proposed for four new aporphine-ben-zylisoquinoline dimers. Thalirevolutine (1) and thalirevoline (2) are related to fetidine (5), the latter is isomeric with fetidine bearing the phenolic group at C-4″, and the former is O methylfetidine. Thalilutidine (3) is the C-6' phenolic analogue of thalicarpine (6), while thalilutine (4) is the C-3 phenolic analogue of adiantifoline (13). © 1977.