ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%28c2cc1c%28OC%28C1%29%28C%29C%29cc2CC%28N%29C%29C/file?format=sdf&get3d=True  -- O%28c2cc1c%28OC%28C1%29%28C%29C%29cc2CC%28N%29C%29C could not be loaded.