http://qiserver.ugr.es/cod/1521792.cif
http://qiserver.ugr.es/cod/1527632.cif
http://qiserver.ugr.es/cod/1527633.cif
http://qiserver.ugr.es/cod/1539195.cif
http://qiserver.ugr.es/cod/1539197.cif