The present invention provides for compounds of Formula I and embodiments and salts thereof for the treatment of diseases (e.g., neurodegenerative diseases). R1, R2, R3, X1, X2, A and Cy variable in Formula all have the meaning as defined herein.本發明提供式I化合物及其實施例及鹽,其用於治療疾病(例如,神經退化疾病)。該式中之R1、R2、R3、X1、X2、A及Cy變量皆具有如本文所定義之含義。