Kiyooka, Syun-Ichi; Fujimoto, Hiroshi; Mishima, Masaaki; Kobayashi, Shinjiro; Uddin, Khabir Md.; Fujio, Mizue
Tetrahedron Letters, 2003 , vol. 44, # 5 p. 927 - 930

US5055621 A1, ;

US2102965 , ;
DRP/DRBP Org.Chem.