[1] Univ Amsterdam, Acad Med Ctr, Dept Med Biochem, NL-1105 AZ Amsterdam, Netherlands
[2] Univ Groningen, Dept Bioorgan Chem, Stratingh Inst Chem, Groningen, Netherlands
[3] Wageningen Univ, Dept Synthet Organ Chem, NL-6700 AP Wageningen, Netherlands