ERROR opening https://cactus.nci.nih.gov/chemical/structure/n1ccccc1C%28c1ccccc1%29%28C%29OCCN%28C%29C/file?format=sdf&get3d=True  -- n1ccccc1C%28c1ccccc1%29%28C%29OCCN%28C%29C could not be loaded.