ERROR opening https://cactus.nci.nih.gov/chemical/structure/C1CCN%28CC1%29C2%3DNC%28%3D%5BN%2B%5D%28C%28%3DC2%29N%29OS%28%3DO%29%28%3DO%29%5BO-%5D%29N/file?format=sdf&get3d=True  -- C1CCN%28CC1%29C2%3DNC%28%3D%5BN%2B%5D%28C%28%3DC2%29N%29OS%28%3DO%29%28%3DO%29%5BO-%5D%29N could not be loaded.