ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC2c3c%28O%5BC%40H%5D%28c1ccc%28OC%29c%28O%29c1%29C2%29cc%28O%29cc3O/file?format=sdf&get3d=True -- O%3DC2c3c%28O%5BC%40H%5D%28c1ccc%28OC%29c%28O%29c1%29C2%29cc%28O%29cc3O could not be loaded.