| —— | 
                                        1-[2-azido-3-O-benzyl-2-deoxy-5-O-methanesulfonyl-4-C-(methanesulfonyloxymethyl)-β-D-erythro-pentofuranosyl]thymine | 
                                        552856-41-4 | 
                                        C20H25N5O10S2 | 
                                        559.578 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (1R,3R,4R,7S)-7-benzyloxy-1-methanesulfonyloxymethyl-5-methyl-3-(thymin-1-yl)-2-oxa-5-azabicyclo[2.2.1]heptane | 
                                        625111-32-2 | 
                                        C20H25N3O7S | 
                                        451.5 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (1R,3R,4R,7S)-7-benzyloxy-1-methanesulfonyloxymethyl-3-(thymin-1-yl)-2-oxa-5-azabicyclo[2.2.1]heptane | 
                                        552856-42-5 | 
                                        C19H23N3O7S | 
                                        437.474 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (1R,3R,4R,7S)-7-benzyloxy-1-hydroxymethyl-5-methyl-3-(thymin-1-yl)-2-oxa-5-azabicyclo[2.2.1]heptane | 
                                        552856-48-1 | 
                                        C19H23N3O5 | 
                                        373.409 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (1R,3R,4R,7S)-7-benzyloxy-1-hydroxymethyl-3-(thymin-1-yl)-2-oxa-5-azabicyclo[2.2.1]heptane | 
                                        552856-44-7 | 
                                        C18H21N3O5 | 
                                        359.382 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (1R,3R,4R,7S)-1-benzoyloxymethyl-7-benzyloxy-3-(thymin-1-yl)-2-oxa-5-azabicyclo[2.2.1]heptane | 
                                        552856-43-6 | 
                                        C25H25N3O6 | 
                                        463.49 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (1R,3R,4R,7S)-7-benzyloxy-1-hydroxymethyl-3-(thymin-1-yl)-5-trifluoroacetyl-2-oxa-5-azabicyclo[2.2.1]heptane | 
                                        1415236-70-2 | 
                                        C20H20F3N3O6 | 
                                        455.391 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (1R,3R,4R,7S)-7-benzyloxy-1-(4,4'-dimethoxytrityl)oxymethyl-3-(thymin-1-yl)-5-trifluoroacetyl-2-oxa-5-azabicyclo[2.2.1]heptane | 
                                        1262529-23-6 | 
                                        C41H38F3N3O8 | 
                                        757.763 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        1-(5-O-4,4'-dimethoxytrityl-2-methylamino-2-N,4-C-methylene-β-D-ribofuranosyl)thymine | 
                                        219601-01-1 | 
                                        C33H35N3O7 | 
                                        585.657 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (1R,3R,4R,7S)-7-benzyloxy-1-(4,4'-dimethoxytrityl)oxymethyl-3-(4-N-acetyl-5-methylcytosin-1-yl)-5-trifluoroacetyl-2-oxa-5-azabicyclo[2.2.1]heptane | 
                                        1415236-76-8 | 
                                        C43H41F3N4O8 | 
                                        798.816 | 
                                    
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
                                                        
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
                                        | —— | 
                                        (1R,3R,4R,7S)-7-benzyloxy-1-(4,4'-dimethoxytrityl)oxymethyl-3-(4-N-benzoyl-5-methylcytosin-1-yl)-5-trifluoroacetyl-2-oxa-5-azabicyclo[2.2.1]heptane | 
                                        1415236-72-4 | 
                                        C48H43F3N4O8 | 
                                        860.887 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (1R,3R,4R,7S)-7-(2-cyanoethoxy(diisopropylamino)phosphinoxy)-1-(4,4'-dimethoxytrityloxymethyl)-5-(hexadecanoyl)-7-hydroxy-3-(4-N-benzoyl-5-methylcytosine-1-yl)-2-oxa-5-azabicyclo[2.2.1]heptane | 
                                        1415236-74-6 | 
                                        C64H85N6O9P | 
                                        1113.39 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (1R,3R,4R,7S)-7-benzyloxy-1-(4,4'-dimethoxytrityl)oxymethyl-3-(5-methylcytosin-1-yl)-5-trifluoroacetyl-2-oxa-5-azabicyclo[2.2.1]heptane | 
                                        1262529-26-9 | 
                                        C41H39F3N4O7 | 
                                        756.778 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        1-(2-methylamino-2-N,4-C-methylene-β-D-ribofuranosyl)thymine | 
                                        219601-00-0 | 
                                        C12H17N3O5 | 
                                        283.284 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (1R,3R,4R,7S)-1-(4,4'-dimethoxytrityloxymethyl)-5-(hexadecanoyl)-7-hydroxy-3-(4-N-benzoyl-5-methylcytosine-1-yl)-2-oxa-5-azabicyclo[2.2.1]heptane | 
                                        1415236-73-5 | 
                                        C55H68N4O8 | 
                                        913.167 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (1R,3R,4R,7S)-(4,4'-dimethoxytrityloxymethyl)-7-hydroxy-5-methyl-3-(4-benzoyl-5-methylcytosin-1-yl)-2-oxa-5-azabicyclo[2.2.1]heptane | 
                                        552856-49-2 | 
                                        C40H40N4O7 | 
                                        688.78 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (1R,3R,4R,7S)-1-(4,4'-dimethoxytrityloxymethyl)-7-hydroxy-5-N-methyl-3-(4-amino-5-methyl-cytosine-1-yl)-2-oxa-5-azabicyclo[2:2:1]heptane | 
                                        1054637-17-0 | 
                                        C33H36N4O6 | 
                                        584.672 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (1R,3R,4R,7S)-1-(4,4'-dimethoxytrityloxymethyl)-5-(hexadecanoyl)-7-hydroxy-3-(5-methylcytosine-1-yl)-2-oxa-5-azabicyclo[2.2.1]heptane | 
                                        1415236-77-9 | 
                                        C48H64N4O7 | 
                                        809.059 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (1R,3R,4R,7S)-7-hydroxy-1-hydroxymethyl-3-(thymin-1-yl)-2-oxa-5-azabicyclo[2.2.1]heptane | 
                                        213697-42-8 | 
                                        C11H15N3O5 | 
                                        269.257 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        (1R,3R,4R,7S)-7-hydroxy-1-(4,4'-dimethoxytrityl)oxymethyl-3-(5-methylcytosin-1-yl)-2-oxa-5-azabicyclo[2.2.1]heptane | 
                                        —— | 
                                        C32H34N4O6 | 
                                        570.645 |