Withasomnine  –5.22  149.2 µM  Ser158, Ile152, Asp153, Asn151, Thr111, Asp295, Phe294, Thr292, Gln110  –6.2  28.68 µM  Ile152, Phe8, Val104, Ile106, Gln110, Thr111, Asn151, Asp153, Phe294  –71.96  –60.03  –11.94  0  His41, His163, His164, Met165, Cys145, Ser144, His172, Glu166, Phe140, Leu141