Carboxy and substituted carboxy alkanoyl and cycloalkanoyl peptides

Claim 1

A compound of the formula ##STR96## and a pharmaceutically acceptable salt thereof wherein: R is hydroxy, lower alkoxy, lower alkyl, ##STR97## R 1 is hydrogen, lower alkyl, halo substituted lower alkyl, ##STR98## R 7 is hydrogen, lower alkyl, halogen, keto, hydroxy, ##STR99## R 10 is halogen or --Y--R 16 ; R 13 is hydrogen, lower alkyl of 1 to 4 carbons, lower alkoxy of 1 to 4 carbons, lower alkylthio of 1 to 4 carbons, chloro, bromo, fluoro, trifluoromethyl, hydroxy, phenyl, phenoxy, phenylthio, or phenylmethyl; R 14 is hydrogen, lower alkyl of 1 to 4 carbons, lower alkoxy of 1 to 4 carbons, lower alkylthio of 1 to 4 carbons, chloro, bromo, fluoro, trifluoromethyl, or hydroxy; n is zero, one, two, three, or four; p is one, two or three provided that p is more than one only if R 13 or R 14 is hydrogen, methyl, methoxy, chloro, or fluoro; R 15 is hydrogen or lower alkyl of 1 to 4 carbons; Y is oxygen or sulfur; R 16 is lower alkyl of 1 to 4 carbons, ##STR100## or the R 16 groups join to complete an unsubstituted 5- or 6-membered ring or said ring in which one or more of the carbons has a lower alkyl of 1 to 4 carbons or a di(lower alkyl of 1 to 4 carbons) substituent; r is an integer from 1 to 4; R 19 is lower alkyl, benzyl, or phenethyl; R 20 is hydrogen, lower alkyl, benzyl or phenethyl; R 6 is hydrogen, lower alkyl, benzyl, benzhydryl, salt forming ion, or ##STR101## R 17 is hydrogen, lower alkyl, cycloalkyl, or phenyl; R 18 is hydrogen, lower alkyl, lower alkoxy or phenyl; M is a salt forming ion; and Z completes a cycloalkyl ring of 3 to 10 carbons, said cycloalkyl ring in which one of the carbon atoms is substituted by a lower alkyl of 1 to 4 carbons, lower alkoxy of 1 to 4 carbons, lower alkylthio of 1 to 4 carbons, halo, trifluoromethyl, or hydroxy group, a cycloalkenyl ring of 5 to 7 carbons, or a cycloalkadienyl ring of 6 or 7 carbons.