ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC1%3DC2C%28%3DCC%28%3DC1%29O%29CCC%28O2%29%28C%29CCC%3DC%28C%29CCC%3DC%28C%29CO/file?format=sdf&get3d=True  -- CC1%3DC2C%28%3DCC%28%3DC1%29O%29CCC%28O2%29%28C%29CCC%3DC%28C%29CCC%3DC%28C%29CO could not be loaded.