It focused on Salvarsan (arsphenamine, "compound 606"), his cure for syphilis. With this new knowledge, Ehrlich tested Compound 606 (chemically arsphenamine) on a syphilis-infected rabbit. In 1907 Alfred Bertheim synthesized Arsphenamine, the first man-made antibiotic. This substance, first called "606", is now known as Arsphenamine or Salvarsan. Ehrlich then found that arsphenamine was found effective against syphilis spirochetes. The company Farbwerke Hoechst marketed arsphenamine as the drug Salvarsan, "the arsenic that saves". Arsphenamine was first synthesized in 1907 in Paul Ehrlich's lab by Alfred Bertheim.