Abstract  Description  Claims  Search report  Cited references 

J. Med. Chem   [0003] 
Chem. Pharm. Bull.   [0003]  [0004] 
J. Med. Chem.   [0003]  [0004] 
Tetrahedron Letters   [0003]  [0004] 
J. Med. Chem.   [0004]