ERROR opening https://cactus.nci.nih.gov/chemical/structure/Fc4ccccc4C/1%3DN/Cc3cnc%28n3c2c%5C1cc%28Cl%29cc2%29C/file?format=sdf&get3d=True  -- Fc4ccccc4C/1%3DN/Cc3cnc%28n3c2c%5C1cc%28Cl%29cc2%29C could not be loaded.