ERROR opening https://cactus.nci.nih.gov/chemical/structure/COc1ccc2c%28c1%29%5BnH%5Dc3c%28C%29nccc23/file?format=sdf&get3d=True  -- COc1ccc2c%28c1%29%5BnH%5Dc3c%28C%29nccc23 could not be loaded.