A series of N-(4,5-dihydroimidazol-2-yl-amino)pyrroles (V) were prepared by reaction of the 2-hydrazino-2-imidazolines with 2,5-diketones. Noticeable oral antihypertensive activity in renal hypertensive dogs was shown by N-(4,5-dihydroimidazol-2-yl-amino)-2,5-dimethyl pyrrole.
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