ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCN%28CC%29CCOc1ccccc1C%28%3DO%29CCc2ccccc2/file?format=sdf&get3d=True  -- CCN%28CC%29CCOc1ccccc1C%28%3DO%29CCc2ccccc2 could not be loaded.