http://qiserver.ugr.es/cod/1558901.cif
http://qiserver.ugr.es/cod/1559917.cif
http://qiserver.ugr.es/cod/1559918.cif
http://qiserver.ugr.es/cod/1559919.cif
http://qiserver.ugr.es/cod/1559920.cif
http://qiserver.ugr.es/cod/1559921.cif
http://qiserver.ugr.es/cod/1559922.cif