 
                AD012563
                    (3S)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-4-oxo-4-prop-2-enoxybutanoic acid
                    
                        144120-53-6
                        
                        
                    
                    
                
                    
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                AD012564
                    (R)-3-((((9H-fluorene-9-yl)methoxy)oxo)amino)-4-(allyloxy)-4-oxobutanoic acid
                    
                        204246-17-3
                        
                        
                    
                    
                
                    
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