ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28CN1C2%3DCC%3DCC%3DC2SC3%3DCC%3DCC%3DC31%29CN%28C%29C/file?format=sdf&get3d=True  -- CC%28CN1C2%3DCC%3DCC%3DC2SC3%3DCC%3DCC%3DC31%29CN%28C%29C could not be loaded.