http://qiserver.ugr.es/cod/1100592.cif
http://qiserver.ugr.es/cod/1100593.cif
http://qiserver.ugr.es/cod/1100594.cif
http://qiserver.ugr.es/cod/2002887.cif
http://qiserver.ugr.es/cod/4027821.cif