http://qiserver.ugr.es/cod/1008981.cif
http://qiserver.ugr.es/cod/1008982.cif
http://qiserver.ugr.es/cod/1008983.cif
http://qiserver.ugr.es/cod/1523365.cif
http://qiserver.ugr.es/cod/1525519.cif
http://qiserver.ugr.es/cod/1533167.cif
http://qiserver.ugr.es/cod/1540771.cif