Antihypertensive amides

Compounds of the structure ##STR13## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are independently hydrogen, lower alkyl, lower alkenyl, lower alkenyl, or phenyl-lower alkyl, wherein the lower alkyl, lower alkenyl and lower alkynyl groups have up to 6 carbon atoms,

• n is an integer from 0 to 4,
• M is lower alkenyl, lower alkynyl, cycloalkyl, cycloalkyl-lower alkyl, bicycloalkyl, fused arylcycloalkyl, phenyl, lower alkylphenyl, phenyl-lower alkyl, hydroxyphenyl, methylenedioxyphenyl, bicycloalkyl-lower alkyl, lower alkylthio-lower alkyl, lower alkoxy-lower alkyl, halophenyl or, lower alkylthiophenyl, wherein the lower alkyl, lower alkenyl and lower alkynyl groups contain up to 6 carbon atoms and the cycloalkyl, cycloalkyl lower alkyl, bicycloalkyl, and fused aryl-cycloalkylkyl groups contain from 3 to 16 carbon atoms,
• Y is hydroxy, lower alkoxy having 1 to 6 carbon atoms or amino,
• R.sub.7 is hydrogen, lower alkanoyl, benzoyl, ZS or ##STR14## wherein the lower alkanoyl contains up to 6 carbon atoms Z is hydrogen, lower alkyl, hydroxy-lower alkyl, amino-lower alkyl, or a radical of the formula ##STR15## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.6, n, M and Y are as defined above, and where Y is hydroxy, their non-toxic, pharmaceutically acceptable alkali metal, alkaline earth metal, and amine salts.