| —— | 
                                        <5R,1'S,2'R,3'S>-5-(1'-t-Butyldimethylsilyloxy-2',3'-O-isopropylidenedioxy-4'-benzyloxy)butyl-5-methoxy-3-(4-methoxybenzyl)hydantoin | 
                                        129744-35-0 | 
                                        C32H46N2O8Si | 
                                        614.811 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        <2S,3R,4R,5S>-2-Benzyloxymethyl-4-t-butyldimethylsilyloxy-3-hydroxy-8-(4-methoxybenzyl)-6,8-diaza-1-oxaspiro<4.4>nonane-7,9-dione | 
                                        129744-37-2 | 
                                        C28H38N2O7Si | 
                                        542.704 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        <2R,3R,4R,5S>-2-Benzyloxymethyl-3,4-dihydroxy-8-(4-methoxybenzyl)-1-oxa-6,8-diazaspiro<4.4>nonane-7,9-dione | 
                                        129744-29-2 | 
                                        C22H24N2O7 | 
                                        428.442 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        <2R,3R,4R,5R>-2-Benzyloxymethyl-3,4-dihydroxy-8-(4-methoxybenzyl)-1-oxa-6,8-diazaspiro<4.4>nonane-7,9-dione | 
                                        130606-99-4 | 
                                        C22H24N2O7 | 
                                        428.442 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (5S,7R,8R,9R)-8,9-dihydroxy-7-(phenylmethoxymethyl)-6-oxa-1,3-diazaspiro[4.4]nonane-2,4-dione | 
                                        129829-45-4 | 
                                        C14H16N2O6 | 
                                        308.291 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        <2R,3R,4R,5R>-3,4-Dihydroxy-2-hydroxymethyl-6,8-diaza-1-oxaspiro<4.4>nonane-7,9-dione | 
                                        130607-01-1 | 
                                        C7H10N2O6 | 
                                        218.166 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        <2R,3R,4R,5S>-3,4-Dihydroxy-2-hydroxymethyl-6,8-diaza-1-oxaspiro<4.4>nonane-7,9-dione | 
                                        129744-33-8 | 
                                        C7H10N2O6 | 
                                        218.166 |