http://qiserver.ugr.es/cod/4517486.cif
http://qiserver.ugr.es/cod/4517487.cif
http://qiserver.ugr.es/cod/4517768.cif
http://qiserver.ugr.es/cod/4517769.cif
http://qiserver.ugr.es/cod/4518049.cif