http://qiserver.ugr.es/cod/9017246.cif
http://qiserver.ugr.es/cod/9017247.cif
http://qiserver.ugr.es/cod/9017248.cif
http://qiserver.ugr.es/cod/9017249.cif
http://qiserver.ugr.es/cod/9017250.cif