http://qiserver.ugr.es/cod/1523409.cif
http://qiserver.ugr.es/cod/1525479.cif
http://qiserver.ugr.es/cod/1528305.cif
http://qiserver.ugr.es/cod/1535545.cif
http://qiserver.ugr.es/cod/1535548.cif