ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28C%29%28C%29C1N%28C%5BC%40H%5D%28O1%29c2cccc%28c2%29O%29C/file?format=sdf&get3d=True  -- CC%28C%29%28C%29C1N%28C%5BC%40H%5D%28O1%29c2cccc%28c2%29O%29C could not be loaded.