http://qiserver.ugr.es/cod/1530840.cif
http://qiserver.ugr.es/cod/1530841.cif
http://qiserver.ugr.es/cod/1530842.cif
http://qiserver.ugr.es/cod/1530843.cif
http://qiserver.ugr.es/cod/1530844.cif
http://qiserver.ugr.es/cod/1541696.cif
http://qiserver.ugr.es/cod/1541789.cif
http://qiserver.ugr.es/cod/1541790.cif