Repository drugs. VI. 4'-[N-(Aralkylidene-, -Benzylidene-, and -naphthylidene)sulfanilyl]anilides, 4'-[N-[(Dimethylamino)methylene]sulfanilyl]anilides, and related sulfanilylanilides with prolonged antimalarial and antileprotic action.

Worth D F, Elslager E F, Phillips A A. Journal of medicinal chemistry. 1969; 12 (4) : 591-6.