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