ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28%3DO%29NC1%3DCC%3DC%28C%3DC1%29S%28%3DO%29%28%3DO%29NC2%3DCC%3DC%28C%3DC2%29%5BN%2B%5D%28%3DO%29%5BO-%5D/file?format=sdf&get3d=True -- CC%28%3DO%29NC1%3DCC%3DC%28C%3DC1%29S%28%3DO%29%28%3DO%29NC2%3DCC%3DC%28C%3DC2%29%5BN%2B%5D%28%3DO%29%5BO-%5D could not be loaded.