1. Department
of Chemistry, P.O.
Box 55, 00014, University of Helsinki,
Helsinki, Finland
2. VTT,
P.O. Box 1000, 02044 VTT,
Espoo, Finland
3. Organic Chemistry
of Wood Components
Laboratory, Departments of Chemistry and Forest Biomaterials, North Carolina State University, Raleigh, North Carolina
27695, United States