ERROR opening https://cactus.nci.nih.gov/chemical/structure/c1ccccc1C%28c2ccccc2%29CC%28NC%28C%29%28C%29C%29C/file?format=sdf&get3d=True  -- c1ccccc1C%28c2ccccc2%29CC%28NC%28C%29%28C%29C%29C could not be loaded.