| —— | 
                                        Acetic acid (8S,8aR,9R)-9-(2-methyl-[1,3]dioxolan-2-ylmethyl)-6-oxo-5,6,7,8,8a,9-hexahydro-1,3-dioxa-5a-aza-dicyclopenta[b,g]naphthalen-8-yl ester | 
                                        218273-10-0 | 
                                        C20H23NO7 | 
                                        389.405 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        Acetic acid (8S,8aS,9R)-9-(2-methyl-[1,3]dioxolan-2-ylmethyl)-6-oxo-5,6,7,8,8a,9-hexahydro-1,3-dioxa-5a-aza-dicyclopenta[b,g]naphthalen-8-yl ester | 
                                        218273-11-1 | 
                                        C20H23NO7 | 
                                        389.405 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        Acetic acid (8S,8aR,9R)-6-oxo-9-(2-oxo-propyl)-5,6,7,8,8a,9-hexahydro-1,3-dioxa-5a-aza-dicyclopenta[b,g]naphthalen-8-yl ester | 
                                        218273-04-2 | 
                                        C18H19NO6 | 
                                        345.352 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        Acetic acid (8S,8aS,9R)-6-oxo-9-(2-oxo-propyl)-5,6,7,8,8a,9-hexahydro-1,3-dioxa-5a-aza-dicyclopenta[b,g]naphthalen-8-yl ester | 
                                        218273-21-3 | 
                                        C18H19NO6 | 
                                        345.352 |