* Corresponding authors

^a Anacor Pharmaceuticals, Inc., 1020 E. Meadow Circle, Palo Alto, CA, USA
E-mail: sbaker@anacor.com
Fax: +1 650 543 7660
Tel: +1 650 543 7543

^b The Pennsylvania State University, 104 Chemistry Building, Chemistry Department, University Park, PA, USA
E-mail: jwt11@psu.edu
Fax: +1 814 865 2973
Tel: +1 814 865 9508

^c The Pennsylvania State University, 414 Wartik Building, Chemistry Department, University Park, PA, USA
E-mail: sjb1@psu.edu
Fax: +1 814 865 2973
Tel: +1 814 865 2882