ERROR opening https://cactus.nci.nih.gov/chemical/structure/c1ccccc1CC%28%20%3D%20O%29C%28%20%3D%20O%29O/file?format=sdf&get3d=True -- c1ccccc1CC%28%20%3D%20O%29C%28%20%3D%20O%29O could not be loaded.