ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCOC1C%3DCC2%3DCC%3DCC%3DC2N1C%28%3DO%29OCC/file?format=sdf&get3d=True  -- CCOC1C%3DCC2%3DCC%3DCC%3DC2N1C%28%3DO%29OCC could not be loaded.