http://qiserver.ugr.es/cod/1543495.cif
http://qiserver.ugr.es/cod/1549532.cif
http://qiserver.ugr.es/cod/1549550.cif
http://qiserver.ugr.es/cod/1559838.cif
http://qiserver.ugr.es/cod/1559839.cif
http://qiserver.ugr.es/cod/1559840.cif