ERROR opening https://cactus.nci.nih.gov/chemical/structure/COC%28%3DO%29C%28C1CCCCN1%29C2%3DCC%28%3DCC%3DC2%29Br/file?format=sdf&get3d=True  -- COC%28%3DO%29C%28C1CCCCN1%29C2%3DCC%28%3DCC%3DC2%29Br could not be loaded.