[1] ETH Honggerberg, Organ Chem Lab, CH-8093 Zurich, Switzerland
[2] Uppsala Univ, Inst Chem, Dept Organ Chem, S-75124 Uppsala, Sweden
[3] Novartis Inst Biomed Res Inc, Infect Dis Biol, Cambridge, MA 02139 USA
[4] Novartis Pharma AG, Preclin Safety RW Exploratory Clin Dev, CH-4002 Basel, Switzerland