http://qiserver.ugr.es/cod/7227277.cif
http://qiserver.ugr.es/cod/7227278.cif
http://qiserver.ugr.es/cod/7227279.cif
http://qiserver.ugr.es/cod/7227280.cif
http://qiserver.ugr.es/cod/7227281.cif
http://qiserver.ugr.es/cod/7227282.cif
http://qiserver.ugr.es/cod/7227283.cif