http://qiserver.ugr.es/cod/1525220.cif
http://qiserver.ugr.es/cod/1525221.cif
http://qiserver.ugr.es/cod/9009253.cif
http://qiserver.ugr.es/cod/9014576.cif
http://qiserver.ugr.es/cod/9015102.cif