| 
                                                        trans-4-Hydroxy-L-proline methyl ester hydrochloride
                                                     | 
                                                
                                            
                                                
                                                    | 
                                                        trans-4-Hydroxyproline Methyl Ester Hydrochloride
                                                     | 
                                                
                                            
                                                
                                                    | 
                                                        L-Hydroxyproline Methyl Ester Hydrochloride
                                                     | 
                                                
                                            
                                                
                                                    | 
                                                        Methyl trans-4-Hydroxy-L-prolinate Hydrochloride
                                                     | 
                                                
                                            
                                                
                                                    | 
                                                        2S,4R)-Methyl 4-hydroxypyrrolidine-2-carboxylate Hydrochloride
                                                     | 
                                                
                                            
                                                
                                                    | 
                                                        Methyl (2S,4R)-4-Hydroxy-2-pyrrolidinecarboxylate Hydrochloride
                                                     | 
                                                
                                            
                                                
                                                    | 
                                                        Methyl L-Hydroxyprolinate Hydrochloride
                                                     |