Synthesis of 1′‐substituted and 1′,3′‐disubstituted (±)‐2R*, 11bS*‐9,10‐Dimethoxy‐1,3,4,6,7,11 b‐Hexahydrospiro‐[benzo[a]quinolizin‐2,5′‐imidazolidine]‐2′,4′‐diones | Publicación