http://qiserver.ugr.es/cod/1541529.cif
http://qiserver.ugr.es/cod/1541530.cif
http://qiserver.ugr.es/cod/1541531.cif
http://qiserver.ugr.es/cod/1541532.cif
http://qiserver.ugr.es/cod/1568792.cif
http://qiserver.ugr.es/cod/1571591.cif