Abstract Two new alkaloids, pseudorine (Ia)(quaternary benzyltetrahydroisoquinoline type) and pseudoronine (II)(benzil type), were isolated from the roots of Papaver pseudo-orientale (FEDDE) MEDW. This is a first occurrence of this type of alkaloids in Papaveraceae. The main component of the tertiary alkaloid fraction was isothebaine accompanied by smaller amounts of orientalidine, mecambridine, bracteolidine, nuciferine, protopine, and ...
