ERROR opening https://cactus.nci.nih.gov/chemical/structure/c1ccc2c%28c1%29c3ccccc3%26%2391%3BnH%26%2393%3B2/file?format=sdf&get3d=True  -- c1ccc2c%28c1%29c3ccccc3%26%2391%3BnH%26%2393%3B2 could not be loaded.