| —— | (3S,4R)-4-(3-bromo-2-hydroxypropyl)-3-[(1R)-1-[tert-butyl(dimethyl)silyl]oxyethyl]azetidin-2-one | 80391-54-4 | C14H28BrNO3Si | 366.371 | 
                                                                                                                                            
                                        | —— | (3S,4R)-4-(3-cyano-2-hydroxypropyl)-3-<(R)-1-(t-butyldimethylsilyloxy)ethyl>-2-azetidinone | 92838-69-2 | C15H28N2O3Si | 312.484 | 
                                                                                                                                            
                                        | —— | 4-bromomethylcarbonylmethyl-2-azetidinone | 80391-55-5 | C14H26BrNO3Si | 364.355 | 
                                                                                                                                            
                                        | —— | (3S,4R)-3-<(R)-1-(t-butyldimethylsilyloxy)ethyl>-4-<(p-nitrobenzyloxycarbonylamino)-2-hydroxybutyl>-2-azetidinone | 96542-74-4 | C23H37N3O7Si | 495.648 | 
                                                                                                                                            
                                        | —— | (3S,4R)-1-[tert-butyl(dimethyl)silyl]-3-[(1R)-1-[tert-butyl(dimethyl)silyl]oxyethyl]-4-(oxiran-2-ylmethyl)azetidin-2-one | 122123-88-0 | C20H41NO3Si2 | 399.721 | 
                                                                                                                                            
                                        | —— | (3S,4R)-3-<(R)-1-(t-butyldimethylsilyloxy)ethyl>-4-<4-(p-nitrobenzyloxycarbonylamino)-2-oxobutyl>-2-azetidinone | 92838-70-5 | C23H35N3O7Si | 493.632 |