ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCCSc2ccc1nc%28NC%28%3DO%29OC%29%5BnH%5Dc1c2/file?format=sdf&get3d=True  -- CCCSc2ccc1nc%28NC%28%3DO%29OC%29%5BnH%5Dc1c2 could not be loaded.