1. Drug Research ProgramDivision of Pharmaceutical Chemistry and TechnologyFaculty of Pharmacy P.O. Box 56 (Viikinkaari 5E) Helsinki FI‐00014 Finland
2. Department of Bioproducts and BiosystemsSchool of Chemical EngineeringAalto University Aalto FI‐00076 Finland
3. Department of ChemistryFaculty of Science Helsinki FI‐00014 Finland
4. Department of Materials Science and EngineeringSchool of Chemical EngineeringAalto University Espoo FI‐02150 Finland