1. VTT, P.O. Box 1000, FI-02044 VTT, Finland
2. Institute of Biotechnology, FI-00014 University of Helsinki, Finland
3. Organic Chemistry of Wood Components Laboratory, Department of Forest Biomaterials, North Carolina State University, Raleigh, North Carolina 27695-8005, United States
4. Department of Forest Products Technology, FI-00076 Aalto University, Finland
5. Department of Wood Science and Forest Products, Virginia Tech, Blacksburg, Virginia 24060, United States
6. Laboratory of Organic Chemistry, Department of Chemistry, P.O. Box 55, FI-00014 University of Helsinki, Finland