ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC2%28C%29CON%28CC1%3DCC%3DCC%3DC1Cl%29C2%3DO/file?format=sdf&get3d=True  -- CC2%28C%29CON%28CC1%3DCC%3DCC%3DC1Cl%29C2%3DO could not be loaded.