1. National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, Colorado 80401-3305, United States
2. Department of Chemistry and Biochemistry, University of Colorado, 215 UCB, Boulder, Colorado 80309-0215, United States
3. Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 16610 Prague, Czech Republic