The present invention provides uses of a compound represented by formula A in the preparation of drugs for treating brain glioma and particularly glioblastoma. Particularly provided are uses of the compound represented by formula A in the preparation of drugs for treating expression of specific fusion protein. By means of the technical solution of the present invention, typing of brain glioblastoma can be implemented, a drug administration can be carried out for a specific patient group, and precise treatment can be implemented.