ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28%3DO%29OC2Cc1ccccc1N%28C%28N%29%3DO%29c3c2cccc3/file?format=sdf&get3d=True  -- CC%28%3DO%29OC2Cc1ccccc1N%28C%28N%29%3DO%29c3c2cccc3 could not be loaded.