| 
                        Column | 
                        YMC-Pack Chiral 
                        Prep PM (10µm, 120Å), 250x4.6mmI.D. | 
                       
                      
                        | 
                        Eluent | 
                        Hexane/ethanol (95/5) | 
                       
                      
                        | 
                        Flow rate | 
                        0.5 mL/min | 
                       
                      
                        | 
                        Temp | 
                        ambient | 
                       
                      
                        | 
                        Detection | 
                        UV at 254 nm | 
                       
                      
                        | 
                        Injection | 
                        5µL (1mg/mL) | 
                       
                     
                     | 
                    
                    
                      
                        | 
                        Column | 
                        YMC-Pack Chiral 
                        Prep ST (10µm, 120Å), 250x4.6mmI.D. | 
                       
                      
                        | 
                        Eluent | 
                        20mM KH2PO4(pH 4.6)/acetonitrile 
                        (99/1) | 
                       
                      
                        | 
                        Flow rate | 
                        1.0 mL/min | 
                       
                      
                        | 
                        Temp | 
                        15℃ | 
                       
                      
                        | 
                        Detection | 
                        UV at 220 nm | 
                       
                      
                        | 
                        Injection | 
                        5µL (1mg/mL) | 
                       
                     
                     |