arsphenamine (ars-fen´a-min)

3,3´-diamino-4,4´-dihydroxyarsenobenzene dihydrochloride;formerly used in the treatment of syphilis, yaws, and some other diseases of protozoan origin, after neutralization with NaOH. The synthesis of a. in 1907 and the demonstration of its usefulness as a therapeutic agent by Paul Ehrlich and co-workers (1909) marked the beginning of chemotherapy.phenarsenamine;


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