ERROR opening https://cactus.nci.nih.gov/chemical/structure/c3ccccc3N%28C%28%3DO%29C%28C%29C%29C%28CC2%29CCN2CCc1ccccc1/file?format=sdf&get3d=True  -- c3ccccc3N%28C%28%3DO%29C%28C%29C%29C%28CC2%29CCN2CCc1ccccc1 could not be loaded.