ERROR opening https://cactus.nci.nih.gov/chemical/structure/CN1CC%28C%3DC2C1CC3%3DCNC4%3DCC%3DCC2%3DC34%29C%28%3DO%29O/file?format=sdf&get3d=True  -- CN1CC%28C%3DC2C1CC3%3DCNC4%3DCC%3DCC2%3DC34%29C%28%3DO%29O could not be loaded.