ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC1%3DC%28C%28C%28%3DC%28N1%29C%29C%28%3DO%29OCCN%28C%29CC2%3DCC%3DCC%3DC2%29C3%3DCC%28%3DCC%3DC3%29N%20%28%3DO%29O-%29C%28%3DO%29OC/file?format=sdf&get3d=True  -- CC1%3DC%28C%28C%28%3DC%28N1%29C%29C%28%3DO%29OCCN%28C%29CC2%3DCC%3DCC%3DC2%29C3%3DCC%28%3DCC%3DC3%29N%20%28%3DO%29O-%29C%28%3DO%29OC could not be loaded.