[1]Kaneko,Toshihiko;Clark,RichardS.J.;Ohi,Norihito;Kawahara,Tetsuya;Akamatsu,Hiroshi;Ozaki,Fumihiro;Kamada,Atsushi;Okano,Kazuo;Yokohama,Hiromitsu;Muramoto,Kenzo;Ohkuro,Masayoshi;Takenaka,Osamu;Kobayashi,Seiichi[ChemicalandPharmaceuticalBulletin,2002,vol.50,#7,p.922-929]
[1]CurrentPatentAssignee:EISAICOLTD-US6518423,2003,B1
[1]CurrentPatentAssignee:PFIZERINC-US4034098,1977,A