http://qiserver.ugr.es/cod/1511564.cif
http://qiserver.ugr.es/cod/1524805.cif
http://qiserver.ugr.es/cod/1539755.cif
http://qiserver.ugr.es/cod/1539759.cif
http://qiserver.ugr.es/cod/1539763.cif
http://qiserver.ugr.es/cod/1540253.cif
http://qiserver.ugr.es/cod/1540255.cif