(13aS)-5,8,13,13a-tTtrahydro-3,10-dimethoxy-6H-dibenzo[a,g]quinolizine-2,9-diol; 3,10-Dimethoxy-13aα-berbine-2,9-diol; (S)-5,8,13,13a-Tetrahydro-3,10-dimethoxy-6H-Dibenzo[a,g]quinolizine-2,9-diol; Scoulerine; (-)-Scoulerine; (S)-(-)-Scoulerine; Scoulerin; l-Scoulerine; Alkaloid HF 1, from Hunnemannia fumariaefolia;

(S)-Scoulerine is an alkaloid found in the opium poppy. (S)-Scoulerine acts as an antagonist at the α2-adrenoceptor, α1D-adrenoceptor and 5-HT receptor.