ERROR opening https://cactus.nci.nih.gov/chemical/structure/Cc1%5BnH%5Dc2c%28n1%29n%28c%28%3DO%29n%28c2%3DO%29C%29Cc3ccco3/file?format=sdf&get3d=True  -- Cc1%5BnH%5Dc2c%28n1%29n%28c%28%3DO%29n%28c2%3DO%29C%29Cc3ccco3 could not be loaded.