Abstract: New and useful phenylalkylcarbohydroxamic acids are disclosed of the formula ##STR1## wherein: (a) R is selected from the group consisting of alkoxy of one to six carbon atoms, alkenyloxy of two to six carbon atoms, alkyl of one to six carbon atoms, and benzyloxy;(b) R.sub.1 and R.sub.2 are each selected from the group consisting of hydrogen, alkoxy of one to six carbon atoms, alkenyloxy of two to six carbon atoms, alkyl from one to six carbon atoms, and benzyloxy;(c) R.sub.3 and R.sub.4 are selected from the group consisting of hydrogen or alkyl of one to six carbon atoms;(d) R.sub.5 is hydrogen or R.sub.5 together with R.sub.3 or R.sub.4 represent methylene; and(e) n signifies the number 0 or 1,and non-toxic salts thereof, which novel compounds exert a pronounced inhibition of blood platelet aggregation and accelerate the disaggregation of platelet aggregates already formed.

Abstract: New and useful phenylalkylcarbohydroxamic acids are disclosed of the formula ##STR1## wherein: (a) R is selected from the group consisting of alkoxy of one to six carbon atoms, alkenyloxy of two to six carbon atoms, alkyl of one to six carbon atoms, and benzyloxy;(b) R.sub.1 and R.sub.2 are each selected from the group consisting of hydrogen, alkoxy of one to six carbon atoms, alkenyloxy of two to six carbon atoms, alkyl from one to six carbon atoms, and benzyloxy;(c) R.sub.3 and R.sub.4 are selected from the group consisting of hydrogen or alkyl of one to six carbon atoms;(d) R.sub.5 is hydrogen or R.sub.5 together with R.sub.3 or R.sub.4 represent methylene; and(e) n signifies the number 0 to 1,and non-toxic salts thereof, which novel compounds exert a pronounced inhibition of blood platelet aggregation and accelerate the disaggregation of platelet aggregates already formed.