ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCC1%3DCC%3DC%28C%3DC1%29OS%28%3DO%29%28%3DO%29O/file?format=sdf&get3d=True -- CCC1%3DCC%3DC%28C%3DC1%29OS%28%3DO%29%28%3DO%29O could not be loaded.