http://qiserver.ugr.es/cod/1504341.cif
http://qiserver.ugr.es/cod/1504342.cif
http://qiserver.ugr.es/cod/1504343.cif
http://qiserver.ugr.es/cod/1504344.cif
http://qiserver.ugr.es/cod/1504345.cif
http://qiserver.ugr.es/cod/1504346.cif
http://qiserver.ugr.es/cod/1504347.cif