ERROR opening https://cactus.nci.nih.gov/chemical/structure/c4ccccc4CCN%28CC1%29CCC1N%28c3ccccc3%29C%28%3DO%29c2ccccc2/file?format=sdf&get3d=True  -- c4ccccc4CCN%28CC1%29CCC1N%28c3ccccc3%29C%28%3DO%29c2ccccc2 could not be loaded.