http://qiserver.ugr.es/cod/1521300.cif
http://qiserver.ugr.es/cod/1541405.cif
http://qiserver.ugr.es/cod/1541406.cif
http://qiserver.ugr.es/cod/1541948.cif
http://qiserver.ugr.es/cod/1541995.cif