ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC%28N1c3c%28Sc2c1cccc2%29cccc3%29CN%28C%29C/file?format=sdf&get3d=True  -- O%3DC%28N1c3c%28Sc2c1cccc2%29cccc3%29CN%28C%29C could not be loaded.