ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC12CCC%28%3DO%29C%3DC1CC3C2CCC4%28C3CCC4%28C%29O%29C/file?format=sdf&get3d=True  -- CC12CCC%28%3DO%29C%3DC1CC3C2CCC4%28C3CCC4%28C%29O%29C could not be loaded.