ERROR opening https://cactus.nci.nih.gov/chemical/structure/CNC%28%3DO%29Oc1cc%28C%29c%28N%28C%29C%29c%28C%29c1/file?format=sdf&get3d=True  -- CNC%28%3DO%29Oc1cc%28C%29c%28N%28C%29C%29c%28C%29c1 could not be loaded.