It does not appear to be useful for tetraethyllead toxicity. The German "Benzinbleigesetz" reduced Tetraethyllead since 1972. Two simple derivatives, tetramethyllead and tetraethyllead, are the best-known organolead compounds. Derivatives of plumbane include lead tetrafluoride, (PbF), and tetraethyllead, ((CHCH)Pb). She worked with tetraethyllead which at the time was not a banned additives for petrol. Other lipid-soluble (fat-soluble) poisons include tetraethyllead compounds (the lead in leaded petrol), and DDT. Tetraethyllead, once added to gasoline, was produced in larger quantities than any other organometallic compound. Among other products, Ethyl Corporation distributes tetraethyllead, an additive used to make leaded gasoline.