The reason why the hyperideal is not sold while salvarsan is, as far as we know, has not been made public. |
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In 1910, with his Japanese colleague Sahachiro Hata, he developed arsphenamine, a synthetic preparation containing arsenic, which sold under the name of Salvarsan. |
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Thus Paul Ehrlich's Salvarsan was an arsenic analogue of an azo dye, and the first sulfa, or wonder, drug, Prontosil, was the metabolic product of a red azo dye. |
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