ERROR opening https://cactus.nci.nih.gov/chemical/structure/c2ccccc2N%28C%28%3DO%29CC%29C1CCN%28CC1C%29Cc3ccccc3/file?format=sdf&get3d=True  -- c2ccccc2N%28C%28%3DO%29CC%29C1CCN%28CC1C%29Cc3ccccc3 could not be loaded.