http://files.docking.org/2D/KB/KBCA.smi
http://files.docking.org/2D/KB/KBCB.smi
http://files.docking.org/2D/KB/KBCD.smi
http://files.docking.org/2D/KB/KBEA.smi
http://files.docking.org/2D/KB/KBEB.smi