ERROR opening https://cactus.nci.nih.gov/chemical/structure/COc4ccccc4N1CCN%28CC1%29C%28Cc2cccc%28O%29c2%29c3ccccc3/file?format=sdf&get3d=True  -- COc4ccccc4N1CCN%28CC1%29C%28Cc2cccc%28O%29c2%29c3ccccc3 could not be loaded.