Treating complications of diabetes mellitus with hydantoin derivatives

Abstract

Novel hydantoin derivatives and salts thereof, the process for the preparation thereof, and medicines containing the same, wherein the hydantoin derivatives are represented by the general formula: ##STR1## wherein X.sub.1 and X.sub.2, which may be the same or different, independently represent a hydrogen atom, a halogen atom, a lower alkyl group or a lower alkoxy group; Y represents an oxygen atom or sulfur atom, R.sub.1 and R.sub.2, which may be the same or different, independently represent a hydrogen atom, a lower alkyl group or phenyl group, or both may form a ring with carbon atoms, excluding the case wherein both R.sub.1 and R.sub.2 are hydrogen atom, and n represents 0 or 1. The novel hydantoin derivatives and salts thereof have excellent effects for the treatment of the complications of diabetes mellitus.

Dependencies are inferred from the claim text.