http://qiserver.ugr.es/cod/1538650.cif
http://qiserver.ugr.es/cod/1538652.cif
http://qiserver.ugr.es/cod/1538653.cif
http://qiserver.ugr.es/cod/1538879.cif
http://qiserver.ugr.es/cod/1538881.cif
http://qiserver.ugr.es/cod/1539860.cif