Description  Claims  Cited references 

US6800751B   [0005] 

J. Chem. Research (S)   [0003] 
J. Chem. Research (M)   [0003] 
Nucleic Acids Symp Ser   [0003] 
Nucleic Acids, Symp. ser.   [0004] 
The Journal of Organic Chemistry   [0005] 
Tetrahedron Lett.   [0006] 
Tetrahedron Letters   [0006]