1. Department of Chemistry, University of Minnesota, 207 Pleasant St. SE, Minneapolis, Minnesota 55455, United States
2. Department of Chemistry, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
3. Enamine Ltd., Chervonotkatska Street 73, Kyiv 02094, Ukraine
4. Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States