ERROR opening https://cactus.nci.nih.gov/chemical/structure/OCC%28O%29C1OC2OC%28OC2C1O%29C%28Cl%29%28Cl%29Cl/file?format=sdf&get3d=True  -- OCC%28O%29C1OC2OC%28OC2C1O%29C%28Cl%29%28Cl%29Cl could not be loaded.