Imidazolidine
                            Order
                            89396-94-1
                            
                                (S)-3-[(S)-2-((S)-1-ETHOXYCARBONYL-3-PHENYL-PROPYLAMINO)-PROPIONYL]-1-METHYL-2-OXO-IMIDAZOLIDINE-4-CARBOXYLIC ACID
                            
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                            Order
                            337308-63-1
                            
                                (4R,5R)-1,3-DIMETHYL-4,5-DIPHENYL-2-[(S)-1-BENZYL-2-HYDROXYETHYLIMINO]IMIDAZOLIDINE