ERROR opening https://cactus.nci.nih.gov/chemical/structure/C1CCCN1C%28CC%29C%28%3DO%29c%28cc2%29ccc2C/file?format=sdf&get3d=True  -- C1CCCN1C%28CC%29C%28%3DO%29c%28cc2%29ccc2C could not be loaded.