http://qiserver.ugr.es/cod/1521123.cif
http://qiserver.ugr.es/cod/1521174.cif
http://qiserver.ugr.es/cod/1521253.cif
http://qiserver.ugr.es/cod/1521399.cif
http://qiserver.ugr.es/cod/1521526.cif