DAIICHI PHARMACEUTICAL CO., LTD.
Patent: EP1762568 A1, 2007 ;
Location in patent: Page/Page column 56 ;

Shvedaite, L. P.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1995 , vol. 31, # 1 p. 63 - 65
Khimiya Geterotsiklicheskikh Soedinenii, 1995 , # 1 p. 73 - 75