N-((2β,11bα)-1,3,4,6,7,11b-hexahydro-2H-benzoquinolizin-2-yl)-N-(2-aminoethyl)methanesulfonamide dihydrochloride 以40%的产率得到C-Chloro-N-[2-((2R,11bS)-1,3,4,6,7,11b-hexahydro-2H-pyrido[2,1-a]isoquinolin-2-yl-methanesulfonyl-amino)-ethyl]-methanesulfonamide; compound with (Z)-but-2-enedioic acid