ERROR opening https://cactus.nci.nih.gov/chemical/structure/c1%28c%28c%28CN2CCNCC2%29ccc1OC%29OC%29OC.Cl.Cl/file?format=sdf&get3d=True  -- c1%28c%28c%28CN2CCNCC2%29ccc1OC%29OC%29OC.Cl.Cl could not be loaded.