ERROR opening https://cactus.nci.nih.gov/chemical/structure/Oc1cc%28O%29cc%28O%29c1-c2c%28O%29cc%28O%29cc2O/file?format=sdf&get3d=True  -- Oc1cc%28O%29cc%28O%29c1-c2c%28O%29cc%28O%29cc2O could not be loaded.