| —— | (1S,5R,6R,7R)-(-)-2-oxa-6-carboxy-7-hydroxybicyclo<3.3.0>-octan-3-one | 59043-00-4 | C8H10O5 | 186.164 | 
                                                                                                                                            
                                        | —— | methyl (1R,2R,3R,5S)-(+)-2-<2-(methoxycarbonyl)-3-hydroxy-5-acetoxycyclopentyl>acetate | 59042-99-8 | C12H18O7 | 274.271 | 
                                                                                                                                            
                                        | (3aR,4R,5R,6aS)-5-乙酰氧基-2-氧代六氢-2H-环戊并[b]呋喃-4-羧酸 | (1S,5R,6R,7R)-(-)-2-oxa-6-carboxy-7-acetoxybicyclo<3.3.0>-octan-3-one | 58717-38-7 | C10H12O6 | 228.202 | 
                                                                                                                                            
                                        | —— | (1S,5R,6R,7R)-(-)-2-oxa-6-(hydroxymethyl)-7-acetoxybicyclo<3.3.0>-octan-3-one | 26054-65-9 | C10H14O5 | 214.218 | 
                                                                                                                                            
                                        | —— | methyl (1R,2R,5S)-(-)-2-<2-(methoxycarbonyl)-3-oxo-5-acetoxycyclopentyl>acetate | 58683-43-5 | C12H16O7 | 272.255 |