1. Advanced Chemistry Development Inc. (ACD/Labs) Toronto ON, M5C 1B5 Canada
2. Department of Chemistry and Biochemistry University of Denver Denver CO 80208 United States
3. Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University 21 Nanyang Link Singapore 637371
4. School of Chemistry and Molecular Biosciences University of Queensland Brisbane 4072 Queensland Australia