http://qiserver.ugr.es/cod/1100203.cif
http://qiserver.ugr.es/cod/1100291.cif
http://qiserver.ugr.es/cod/1100308.cif
http://qiserver.ugr.es/cod/1100345.cif
http://qiserver.ugr.es/cod/1543051.cif
http://qiserver.ugr.es/cod/2100577.cif
http://qiserver.ugr.es/cod/4100449.cif