The present invention relates to compound of formula I, pharmaceutically acceptable salt and/or its solvate and/or its hydrate. The preparation method of this compound, the pharmaceutical composition containing this compound and its purposes that neurodegenerative disease drug is prepared with what. ,Wherein R1 is the linear chain or branched chain alkane of hydrogen or 1-4 carbon atom, and R2 is the linear chain or branched chain alkane of 1-4 carbon atom, or by the linear chain or branched chain alkane of the cyclosubstituted 1-4 carbon atom of benzene.本發明涉及式I化合物,其藥物上可接受的鹽和/或其溶劑化物和/或其水合物。此化合物的製備方法,含有此化合物的藥物組合物及其用於製備神經退行性疾病防治藥物的用途。,其中R1爲氫或1-4個碳原子的直鏈或支鏈烷烴,R2爲1-4個碳原子的直鏈或支鏈烷烴,或被苯環取代的1-4個碳原子的直鏈或支鏈烷烴。