ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC1OCc2c1c%28O%29c%28c%28OC%29c2C%29C%5CC%3DC%28/C%29CCC%28%3DO%29O/file?format=sdf&get3d=True -- O%3DC1OCc2c1c%28O%29c%28c%28OC%29c2C%29C%5CC%3DC%28/C%29CCC%28%3DO%29O could not be loaded.