http://qiserver.ugr.es/cod/1522951.cif
http://qiserver.ugr.es/cod/1522952.cif
http://qiserver.ugr.es/cod/1522953.cif
http://qiserver.ugr.es/cod/1522954.cif
http://qiserver.ugr.es/cod/1538215.cif