[1] Helmholtz Ctr Infect Res, Helmholtz Inst Pharmaceut Res Saarland HIPS, Chem Biol Carbohydrates CBCH, D-66123 Saarbrucken, Germany
[2] Deutsch Zentrum Far Infektionsforsch DZIF Standor, D-38124 Braunschweig, Germany
[3] Saarland Univ, Dept Chem, D-66123 Saarbrucken, Germany
[4] Saarland Univ, Dept Pharm, D-66123 Saarbrucken, Germany
[5] Helmholtz Ctr Infect Res, Helmholtz Inst Pharmaceut Res Saarland HIPS, Microbial Nat Prod MINS, D-66123 Saarbrucken, Germany
[6] Helmholtz Inst Pharmaceut Res Saarland HIPS, Helmholtz Ctr Infect Res, Drug Design & Optimisat DDOP, D-66123 Saarbracken, Germany
[7] URSAPHARM Arzneimittel GmbH, D-66129 Saarbrucken, Germany
[8] Hsch Kaiserslautern, Prot Chem Grp, D-66953 Pirmasens 66953, Germany