ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCC%28%3DO%29C%28C%5BC%40H%5D%28C%29N%28C%29C%29%28C1%3DCC%3DCC%3DC1%29C2%3DCC%3DCC%3DC2/file?format=sdf&get3d=True  -- CCC%28%3DO%29C%28C%5BC%40H%5D%28C%29N%28C%29C%29%28C1%3DCC%3DCC%3DC1%29C2%3DCC%3DCC%3DC2 could not be loaded.