| —— | tert-butyl (7S,8R,8aR)-7'-bromo-8-hydroxy-3,3-dimethyl-2',5-dioxospiro[8,8a-dihydro-1H-[1,3]oxazolo[3,4-c][1,3]oxazine-7,3'-indole]-1'-carboxylate | 368872-52-0 | C20H23BrN2O7 | 483.316 | 
                                                                                                                                            
                                        | —— | tert-butyl (7S,8R,8aR)-8-benzoyloxy-7'-bromo-3,3-dimethyl-2',5-dioxospiro[8,8a-dihydro-1H-[1,3]oxazolo[3,4-c][1,3]oxazine-7,3'-indole]-1'-carboxylate | 368872-54-2 | C27H27BrN2O8 | 587.424 | 
                                                                                                                                            
                                        | —— | (2S,3S)-2-[[(4S,5R,6S)-5-benzoyloxy-7'-bromo-2,2'-dioxospiro[1,3-oxazinane-6,3'-1H-indole]-4-carbonyl]amino]-3-hydroxybutanoic acid | 368872-58-6 | C23H20BrN3O9 | 562.331 | 
                                                                                                                                            
                                        | —— | (4S,5R,6S)-5-benzoyloxy-7'-bromo-2,2'-dioxospiro[1,3-oxazinane-6,3'-1H-indole]-4-carboxylic acid | 368872-56-4 | C19H13BrN2O7 | 461.225 |