ERROR opening https://cactus.nci.nih.gov/chemical/structure/C%5BC%40H%5D1NCCC2%3DCC%28O%29%3DC%28C%3DC12%29OC/file?format=sdf&get3d=True  -- C%5BC%40H%5D1NCCC2%3DCC%28O%29%3DC%28C%3DC12%29OC could not be loaded.