1. Department of Chemistry Memorial University of Newfoundland 283 Prince Philip Drive St. John's NL A1B 3X7 Canada
2. Institute of Organic Chemistry and Biochemistry Academy of Sciences of the Czech Republic Flemingovo nám. 2 16610 Prague 6 Czech Republic
3. Department of Chemistry and Biochemistry Wilfrid Laurier University 75 University Avenue West Waterloo ON N2L 3C5 Canada