ERROR opening https://cactus.nci.nih.gov/chemical/structure/c12c%28c%28c%28C%28O%29%3DO%29cn1CC%29%3DO%29cc%28F%29c%28n2%29N1CCNCC1/file?format=sdf&get3d=True  -- c12c%28c%28c%28C%28O%29%3DO%29cn1CC%29%3DO%29cc%28F%29c%28n2%29N1CCNCC1 could not be loaded.