http://qiserver.ugr.es/cod/1523301.cif
http://qiserver.ugr.es/cod/1523302.cif
http://qiserver.ugr.es/cod/1523876.cif
http://qiserver.ugr.es/cod/1524281.cif
http://qiserver.ugr.es/cod/1524282.cif
http://qiserver.ugr.es/cod/1538195.cif