Amide derivatives as inhibitors of renin enzyme activity.

A compound of formula (I) or a pharmaceutically acceptable salt thereof; wherein Y represents the group -C (= X) or SO2; and (i) R1 and R2 together form a single bond or methylene; and, if Y represents the group -C (= X), X represents NH, S or O; or (ii) R1 represents amino; R2 represents hydrogen and, if Y represents the group -C (= X), X represents NH.