| —— | (2S,4aR,4'aS,8aS,8'aR)-spiro[4,4a,6,7,8,8a-hexahydropyrano[3,2-b]pyran-2,2'-6,7,8,8a-tetrahydro-4aH-pyrano[3,2-b]pyran]-3-one | 440083-34-1 | C15H20O5 | 280.321 | 
                                                                                                                                            
                                        | —— | (2R,4aR,4'aS,8aS,8'aR)-spiro[4,4a,6,7,8,8a-hexahydropyrano[3,2-b]pyran-2,2'-6,7,8,8a-tetrahydro-4aH-pyrano[3,2-b]pyran]-3-one | 440083-35-2 | C15H20O5 | 280.321 | 
                                                                                                                                            
                                        | —— | (2S,3S,4aR,4'aS,8aS,8'aR)-spiro[4,4a,6,7,8,8a-hexahydro-3H-pyrano[3,2-b]pyran-2,2'-6,7,8,8a-tetrahydro-4aH-pyrano[3,2-b]pyran]-3-ol | 440083-38-5 | C15H22O5 | 282.337 | 
                                                                                                                                            
                                        | —— | Mpeosjybqmqbik-depyfdjdsa- | 440083-39-6 | C15H22O5 | 282.337 |