Two New Oxoaporphine Alkaloids from Thalictrum elegans

Abstract Two new oxoaporphine alkaloids, 1,2,3,10‐tetramethoxy‐9‐(2‐hydroxy‐4,5‐dimethoxybenzyloxy)oxoaporphine (1) and 1,2,3,10‐tetramethoxy‐9‐(4,5‐dimethoxy‐2‐formylphenoxy)oxoaporphine (2), were isolated from Thalictrum elegans. Their structures were elucidated based on spectroscopic analysis including 1D, 2D NMR, IR and MS.