| abstract |
The present invention is a novel substance exhibiting an excellent effect on the neuroprotective effect represented by the following formula (1), pyruvate derivatives and their pharmaceutically acceptable salts and pharmaceutical agents for the treatment and prevention of brain diseases containing the same as an active ingredient To a pharmaceutical composition.n n n [Formula 1]n n n n n n n n In Formula 1, A, B, R 1 , R 2 , R 3 , R 4, and R 5 are each as defined in the detailed description of the invention. |