ERROR opening https://cactus.nci.nih.gov/chemical/structure/%5BO-%5D%5BP%2B%5D%28Cl%29%28Cl%29Cl/file?format=sdf&get3d=True  -- %5BO-%5D%5BP%2B%5D%28Cl%29%28Cl%29Cl could not be loaded.