6,7-dimethoxy-1-(4-(trifluoromethyl)phenethyl)-1,2,3,4-tetrahydroisoquinoline   、                                                                                      
(2R.3R)-2'-Chlor-tartranilsaeure                                                                                                                                                                                              以
                                                                                         
乙醇                                                                                  为溶剂,
                                                                                                                                                                                        以86%的产率得到(R)-6,7-dimethoxy-1-[2-(4-trifluoromethyl-phenyl)-ethyl]-1,2,3,4-tetrahydro-isoquinoline (2R,3R)-N-(2-chloro-phenyl)-2,3-dihydroxy-succinamic salt