ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC1%3DCC2%3DCC%3DCC%3DC2C3%3DC1C4%3DCC%3DCC%3DC4C%3DC3/file?format=sdf&get3d=True  -- CC1%3DCC2%3DCC%3DCC%3DC2C3%3DC1C4%3DCC%3DCC%3DC4C%3DC3 could not be loaded.