1. Environmental and Computational Chemistry Group, School of Pharmaceutical Sciences, Zaragocilla Campus Univ. of Cartagena Cartagena 130014 Colombia
2. Civil Engineering Dep. Univ. of La Costa Street 58 # 55–66 Barranquilla Colombia
3. Chemistry Dep. Federal Univ. of Santa Maria Av. Roraima, 1000 Santa Maria RS 97105–900 Brazil