http://qiserver.ugr.es/cod/1520875.cif
http://qiserver.ugr.es/cod/1523463.cif
http://qiserver.ugr.es/cod/1524263.cif
http://qiserver.ugr.es/cod/1529692.cif
http://qiserver.ugr.es/cod/1529693.cif