ERROR opening https://cactus.nci.nih.gov/chemical/structure/C2%3DC%28C%3DC%28CC1%3DCC%28%3DCC%3DC1O%29Cl%29C%28%3DC2%29O%29Cl/file?format=sdf&get3d=True  -- C2%3DC%28C%3DC%28CC1%3DCC%28%3DCC%3DC1O%29Cl%29C%28%3DC2%29O%29Cl could not be loaded.