草酸   、                                                                                      (2S)-(-)-3-[(2S,4R)-4-(5-chlorobenzo[b]thiophen-2-yl)-2-methylpiperidinyl]-1-(1H-2-methylindol-4-yl)oxy-2-propanol                                                                                                                                                                                              以
                                                                                         
乙酸乙酯                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 
(2S)-(-)-3-[(2S,4R)-4-(5-chlorobenzo[b]thiophen-2-yl)-2-methylpiperidinyl]-1-(1H-2-methylindol-4-yl)oxy-2-propanol oxalate