http://qiserver.ugr.es/cod/1523599.cif
http://qiserver.ugr.es/cod/1537714.cif
http://qiserver.ugr.es/cod/1537716.cif
http://qiserver.ugr.es/cod/1537718.cif
http://qiserver.ugr.es/cod/1537990.cif