ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCNC%28C%29C%28%3DO%29C1%3DCC%3DC%28C%3DC1%29F/file?format=sdf&get3d=True  -- CCNC%28C%29C%28%3DO%29C1%3DCC%3DC%28C%3DC1%29F could not be loaded.