ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC12CCC3C%28C1CC%3DC2%29CC%3DC4C3%28CCC%28C4%29O%29C/file?format=sdf&get3d=True  -- CC12CCC3C%28C1CC%3DC2%29CC%3DC4C3%28CCC%28C4%29O%29C could not be loaded.