1. Department of Chemistry, University of Utah, 315 S. 1400 E., Salt Lake City, UT 84112, USA.
2. Molecular Design, GlaxoSmithKline, 1250 S. Collegeville Rd., Collegeville, PA 19426, USA.
3. Drug Substance Development, GlaxoSmithKline, 1250 S. Collegeville Rd., Collegeville, PA 19426, USA.