http://qiserver.ugr.es/cod/1523091.cif
http://qiserver.ugr.es/cod/1538270.cif
http://qiserver.ugr.es/cod/1538271.cif
http://qiserver.ugr.es/cod/1538272.cif
http://qiserver.ugr.es/cod/1538273.cif