White to off-white powder

    
        
            
            
Items
            
            
            
Standard
            
        
        
            
            
Appearance
            
            
            
White to off-white crystalline powder
            
        
        
            
            
Specific rotation [a] 20/D
            
            
            
-12.5 to –14.5 degree (C=1 in DMF)
            
        
        
            
            
300MHz 1H
            
            
            
Consistent
            
        
        
            
            
Melting point
            
            
            
120 to 124 degree C
            
        
        
            
            
TCL
            
CH3Cl3:MeOH:AcOH 32%(5:3:1)
            
            
            
Purity≥98%
            
        
        
            
            
Assay
            
            
            
Not less than 98.0%