ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC12CCC3C%28%3DCCC4%3DC3C%3DCC%28%3DC4%29O%29C1CCC2O/file?format=sdf&get3d=True  -- CC12CCC3C%28%3DCCC4%3DC3C%3DCC%28%3DC4%29O%29C1CCC2O could not be loaded.