| abstract |
The invention provides novel hydrazine derivatives of the formula: ##STR1## in which R is a variously substituted oxy or thio substituted phenyl radical, 2-oxobenzimidazol-5-yl radical or 3-pyridyl radical; n R' is a radical of formula: ##STR2## in which R 5 and R 6 taken separately are each hydrogen, and taken together form, with the nitrogen atoms to which they are attached, an imidazolinyl radical of formula; ##STR3## and R" is hydrogen or lower alkyl, and the pharmaceutically acceptable addition salts, with non-toxic acids, of these hydrazine derivatives. n These compounds are useful as anti-hypertensive agents. |