ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28N%28c1ccccc1%29c2ccccc2%29C%28O%29%3DO/file?format=sdf&get3d=True  -- CC%28N%28c1ccccc1%29c2ccccc2%29C%28O%29%3DO could not be loaded.