1. School of ChemistryUniversity of Manchester Oxford Road Manchester M13 9PL UK
2. Early Chemical Development, Pharmaceutical Sciences, IMED Biotech UnitAstraZeneca Macclesfield SK10 2NA UK
3. Department of ChemistryFaculty of ScienceKing Faisal University P.O. Box 380 Al-Ahsa 31982 Saudi Arabia