ERROR opening https://cactus.nci.nih.gov/chemical/structure/o%3An%28%3Ao%29-c1ccc2c%28Cc3ccccc23%29c1/file?format=sdf&get3d=True  -- o%3An%28%3Ao%29-c1ccc2c%28Cc3ccccc23%29c1 could not be loaded.