http://qiserver.ugr.es/cod/1537494.cif
http://qiserver.ugr.es/cod/1537495.cif
http://qiserver.ugr.es/cod/1539493.cif
http://qiserver.ugr.es/cod/1542170.cif
http://qiserver.ugr.es/cod/1542171.cif
http://qiserver.ugr.es/cod/1542172.cif