http://qiserver.ugr.es/cod/1523785.cif
http://qiserver.ugr.es/cod/1523793.cif
http://qiserver.ugr.es/cod/1524498.cif
http://qiserver.ugr.es/cod/1524499.cif
http://qiserver.ugr.es/cod/1527484.cif
http://qiserver.ugr.es/cod/1527485.cif
http://qiserver.ugr.es/cod/1527909.cif