[1] Univ Nebraska, Dept Chem, Omaha, NE 68182 USA
[2] Univ Nebraska Med Ctr, Ctr Drug Discovery, Omaha, NE USA
[3] Univ Nebraska Med Ctr, Dept Pharmaceut Sci, Omaha, NE USA
[4] UNMC, Ctr Staphylococcal Res, Omaha, NE USA
[5] UNMC, Dept Pathol & Microbiol, Omaha, NE USA
[6] UNMC, Fred & Pamela Buffett Canc Ctr, Omaha, NE USA
[7] UNMC, Coll Pharm, Pharm Practice, Omaha, NE USA