(untitled) - Kohgo,S.; Yamada,K.; Kitano,K.; Iwai,Y.; Sakata,S.; Ashida,N.; Hayakawa,H.; Nameki,D.; Kodama,E.; Matsuoka,M.; Mitsuya,H.; Ohrui,H. (Nucleosides, Nucleotides Nucleic Acids, 2004)