ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC1%3DCC%5BC%40%40H%5D%28C%3DC1%29C%28C%29C/file?format=sdf&get3d=True  -- CC1%3DCC%5BC%40%40H%5D%28C%3DC1%29C%28C%29C could not be loaded.