1. Department of Chemistry; Marquette University, 1414 W. Clybourn St., Milwaukee; WI 53233 USA
2. Department of Organic Chemistry; Faculty of Chemistry; Razi University; 67149-67346, Kermanshah, Iran; Medical Biology Research Centre, Kermanshah University of Medical Sciences, Kermanshah Iran
3. Department of Chemistry; University of British Columbia; Okanagan; 3247 University Way, Kelowna, British Columbia V1 V 1 V7 Canada