[1] Leibniz Inst Plant Biochem, Dept Bioorgan Chem, Weinberg 3, D-06120 Halle, Salle, Germany
[2] Univ Stellenbosch, Dept Chem & Polymer Sci, Private Bag X1, ZA-7600 Stellenbosch, South Africa
[3] Islamia Univ Bahawalpur, Dept Chem, Bahawalpur 63100, Pakistan
[4] Lund Univ Hosp, Biomed Ctr BMC, Dept Clin Sci, S-22362 Lund, Sweden
[5] Govt Sadiq Coll Women Univ Bahawalpur, Dept Chem, Bahawalpur 63100, Pakistan