| —— | 
                                        echinosporin | 
                                        79127-35-8 | 
                                        C10H9NO5 | 
                                        223.185 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        methyl (4aS,5S,7aS)-3-carbamoyl-1,5-dihydroxy-4a,7a-dihydro-1H-cyclopenta[c]pyran-5-carboxylate | 
                                        123487-79-6 | 
                                        C11H13NO6 | 
                                        255.227 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        methyl (1S,2R,5R,6R,7R,8S)-4,5,8-trihydroxy-3-oxatricyclo[5.3.0.02,6]dec-9-ene-8-carboxylate | 
                                        123487-75-2 | 
                                        C11H14O6 | 
                                        242.229 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        methyl (1S,2R,6R,8R,9S,12S,13R)-12-hydroxy-4,4-dimethyl-3,5,7-trioxatetracyclo[6.5.0.02,6.09,13]tridec-10-ene-12-carboxylate | 
                                        123487-74-1 | 
                                        C14H18O6 | 
                                        282.293 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        methyl (1S,2R,5R,6R,7R,8S)-5,8-dihydroxy-4-oxo-3-oxatricyclo[5.3.0.02,6]dec-9-ene-8-carboxylate | 
                                        123487-76-3 | 
                                        C11H12O6 | 
                                        240.213 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (1R,2S,5S,6R)-7-((R)-Carbamoyl-hydroxy-methyl)-2,6-dihydroxy-bicyclo[3.2.0]hept-3-ene-2-carboxylic acid methyl ester | 
                                        123487-78-5 | 
                                        C11H15NO6 | 
                                        257.243 |