http://qiserver.ugr.es/cod/1523729.cif
http://qiserver.ugr.es/cod/1529678.cif
http://qiserver.ugr.es/cod/1530453.cif
http://qiserver.ugr.es/cod/1530485.cif
http://qiserver.ugr.es/cod/1530536.cif
http://qiserver.ugr.es/cod/1530635.cif
http://qiserver.ugr.es/cod/9009541.cif