ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCN1CCC2%3DCC%28%3DC3C%28%3DC2C1C%29OCO3%29OC/file?format=sdf&get3d=True  -- CCN1CCC2%3DCC%28%3DC3C%28%3DC2C1C%29OCO3%29OC could not be loaded.