ERROR opening https://cactus.nci.nih.gov/chemical/structure/C1%3DCC%28%3DC%28C%3DC1/C%3DN/N%3DC%28N%29N%29Br%29Br/file?format=sdf&get3d=True  -- C1%3DCC%28%3DC%28C%3DC1/C%3DN/N%3DC%28N%29N%29Br%29Br could not be loaded.