ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC1%3DCC%28%3DO%29C%28%3DCC1%3DO%29C%28C%29C/file?format=sdf&get3d=True  -- CC1%3DCC%28%3DO%29C%28%3DCC1%3DO%29C%28C%29C could not be loaded.