ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%28c1cc%28c%28OC%29cc1CC%28N%29CC%29C%29C/file?format=sdf&get3d=True  -- O%28c1cc%28c%28OC%29cc1CC%28N%29CC%29C%29C could not be loaded.