http://qiserver.ugr.es/cod/1521041.cif
http://qiserver.ugr.es/cod/1524334.cif
http://qiserver.ugr.es/cod/1524335.cif
http://qiserver.ugr.es/cod/1526812.cif
http://qiserver.ugr.es/cod/1526814.cif
http://qiserver.ugr.es/cod/1527867.cif
http://qiserver.ugr.es/cod/1537446.cif