AD004275
                    (2S)-2-(9H-fluoren-9-ylmethoxycarbonylamino)-5-oxo-5-prop-2-enoxypentanoic acid
                    
                        133464-46-7
                        
                        
                    
                    
                
                    
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                AD004282
                    (4S)-4-(9H-fluoren-9-ylmethoxycarbonylamino)-5-oxo-5-prop-2-enoxypentanoic acid
                    
                        144120-54-7
                        
                        
                    
                    
                
                    
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                AD004292
                    (4S)-5-methoxy-4-[(2-methylpropan-2-yl)oxycarbonylamino]-5-oxopentanoic acid
                    
                        72086-72-7
                        
                        
                    
                    
                
                    
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