256S-649266, a Novel Siderophore Cephalosporin: Mechanisms of enhanced activity and beta-lactamase stability. (December 2014) - Tsuji, Masakatsu; Ito, Akinobu; Horiyama, Tsukasa; Fukuhara, Norio; Nakamura, Rio; Yamano, Yoshionori; Shimada, Jingoro; Ishii, Yoshikazu; Yamaguchi, Keizo; Tateda, Kazuhiro