Eisai Company, Limited

Kouichiro Ueda

Tadashi Sato

Satoru Tanaka

Tsuneo Wakabayashi

Issei Ohtsuka

Toshinobu Kunii

Toshiharu Ohgoh

Kengo Kagei

Mayumi Kawase

Hideki Ono

Ono Hideki

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, mean independently hydrogen atom, a halogen atom, a lower alkyl group or a lower alkoxy group; Y means oxygen atom or sulfur atom, R.sub.1 and R.sub.2, which may be the same or different, mean independently hydrogen atom, a lower alkyl group or phenyl group, or the both may form a ring with a carbon atom which is combined with them, excluding the case wherein both R.sub.1 and R.sub.2 are hydrogen atom at the same time, and n means an integer of 0 or 1. The novel hydantoin derivatives and salts thereof have excellent effects for the treatment of the complications of the diabetes mellitus.

Hydantoin derivatives and medicines containing the same

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 the substituents are defined hereinbelow. The hydantoin derivatives and salts thereof have excellent effects for the treamtment of the complications of the diabetes mellitus.

Hydantoin derivatives for treating complications of diabetes

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.

Treating complications of diabetes mellitus with hydantoin derivatives

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Saitama, Japan

Kouichiro Ueda