| —— | 1α,3β-bis(tert-butyldimethylsilyloxy)-20(S)-(isopropoxycarbonylmethoxy)-9,10-secopregna-5,7,10(19),16-tetraene | 381213-03-2 | C38H66O5Si2 | 659.11 | 
                                                                                                                                            
                                        | —— | 1α,3β-bis(tert-butyldimethylsilyloxy)-20(S)-(cyclopropylmethoxycarbonylmethoxy)-9,10-secopregna-5,7,10(19),16-tetraene | 381212-86-8 | C39H66O5Si2 | 671.121 | 
                                                                                                                                            
                                        | —— | 1α,3β-bis(tert-butyldimethylsilyloxy)-20(S)-(1-methylcyclohexyloxycarbonylmethoxy)-9,10-secopregna-5,7,10(19),16-tetraene | 381212-22-2 | C42H72O5Si2 | 713.202 | 
                                                                                                                                            
                                        | —— | 1α,3β-bis(tert-butyldimethylsilyloxy)-20(S)-(1-methylcycloheptyloxycarbonylmethoxy)-9,10-secopregna-5,7,10(19),16-tetraene | 381212-54-0 | C43H74O5Si2 | 727.229 | 
                                                                                                                                            
                                        | —— | 1α,3β-bis(tert-butyldimethylsilyloxy)-20(S)-(1-methylcyclopentyloxycarbonylmethoxy)-9,10-secopregna-5,7,10(19),16-tetraene | 381212-26-6 | C41H70O5Si2 | 699.175 | 
                                                                                                                                            
                                        | —— | 1α,3β-bis(tert-butyldimethylsilyloxy)-20(S)-(1-ethylcyclopentyloxycarbonylmethoxy)-9,10-secopregna-5,7,10(19),16-tetraene | 381212-48-2 | C42H72O5Si2 | 713.202 | 
                                                                                                                                            
                                        | —— | 1α,3β-bis(tert-butyldimethylsilyloxy)-20(S)-(1-cyclopropyl-1-methylethoxycarbonylmethoxy)-9,10-secopregna-5,7,10(19),16-tetraene | 381212-50-6 | C41H70O5Si2 | 699.175 |