ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28%3DO%29C%28C%29%28C1%3DCC%3DC%28C%3DC1%29N%29C2%3DCC%3DC%28C%3DC2%29N/file?format=sdf&get3d=True  -- CC%28%3DO%29C%28C%29%28C1%3DCC%3DC%28C%3DC1%29N%29C2%3DCC%3DC%28C%3DC2%29N could not be loaded.