AD012550
                    (2S)-3-(4-aminophenyl)-2-(9H-fluoren-9-ylmethoxycarbonylamino)propanoic acid
                    
                        95753-56-3
                        
                        
                    
                    
                
                    
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                AD012556
                    (S)-4-((((9H-fluorene-9-yl)methoxy)oxo)amino)-5-methoxy-5-oxopentanoic acid
                    
                        145038-49-9
                        
                        
                    
                    
                
                    
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