http://qiserver.ugr.es/cod/1100374.cif
http://qiserver.ugr.es/cod/4126269.cif
http://qiserver.ugr.es/cod/4126270.cif
http://qiserver.ugr.es/cod/5000247.cif
http://qiserver.ugr.es/cod/5000271.cif