| —— | 
                                        methyl (1R,2S,3R,4R)-2,3-[(dimethylmethylene)dioxy]-4-formyl-cyclopentane-1-carboxylate | 
                                        85390-36-9 | 
                                        C11H16O5 | 
                                        228.245 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (1R,2S,3R,4S)-2,3-isopropylidenedioxy-4-(1'-methoxycarbonyl-1'-oxomethyl)cyclopentane-1-carboxylic acid | 
                                        85026-57-9 | 
                                        C12H16O7 | 
                                        272.255 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (3aS,4R,6R,6aR)-6-(1,2-Dihydroxy-ethyl)-2,2-dimethyl-tetrahydro-cyclopenta[1,3]dioxole-4-carboxylic acid | 
                                        84955-42-0 | 
                                        C11H18O6 | 
                                        246.26 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (3aS,4R,6S,6aR)-6-Formyl-2,2-dimethyl-tetrahydro-cyclopenta[1,3]dioxole-4-carboxylic acid | 
                                        84955-43-1 | 
                                        C10H14O5 | 
                                        214.218 |