ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCC%28N%29Cc2c%5BnH%5Dc1ccc%28cc12%29OC/file?format=sdf&get3d=True  -- CCC%28N%29Cc2c%5BnH%5Dc1ccc%28cc12%29OC could not be loaded.