ERROR opening https://cactus.nci.nih.gov/chemical/structure/COc1ccc2c%28c1%29c%28%3DO%29n-3c%28n2%29%5BC%40%40H%5D4CCCN4C%28%3DO%29c5c3cccc5/file?format=sdf&get3d=True  -- COc1ccc2c%28c1%29c%28%3DO%29n-3c%28n2%29%5BC%40%40H%5D4CCCN4C%28%3DO%29c5c3cccc5 could not be loaded.