http://qiserver.ugr.es/cod/1522714.cif
http://qiserver.ugr.es/cod/1522715.cif
http://qiserver.ugr.es/cod/1522716.cif
http://qiserver.ugr.es/cod/1537997.cif
http://qiserver.ugr.es/cod/1537998.cif
http://qiserver.ugr.es/cod/1537999.cif
http://qiserver.ugr.es/cod/1538000.cif