http://qiserver.ugr.es/cod/1535667.cif
http://qiserver.ugr.es/cod/1537025.cif
http://qiserver.ugr.es/cod/1537029.cif
http://qiserver.ugr.es/cod/1537033.cif
http://qiserver.ugr.es/cod/2002531.cif
http://qiserver.ugr.es/cod/2002532.cif