[1] Univ So Denmark, Dept Chem & Phys, DK-5230 Odense M, Denmark
[2] Univ Dusseldorf, Inst Pharmaceut & Med Chem, D-40225 Dusseldorf, Germany
[3] Univ Bonn, Inst Pharmaceut Biol, Dept Mol Cellular & Pharmacobiol, D-53115 Bonn, Germany
[4] Univ Tubingen, Dept Internal Med, Div Endocrinol Diabetol Vasc Med Nephrol & Clin C, D-72076 Tubingen, Germany
[5] Univ Copenhagen, Dept Biol, DK-2200 Copenhagen N, Denmark