Ehrlich's laboratory developed a more soluble (but slightly less effective) arsenical compound, Neosalvarsan (neoarsphenamine), which was easier to prepare, and it became available in 1912.
Erlihova laboratorija je razvila rastvornije (mada nešto manje efektivno) jedinjenje arsenika, Neosalvarsan (neoarsfenamin), koje se lakše pripremalo, i ono je postalo dostupno 1912.