Provided herein are formulations, processes, solid forms and methods of use relating to 1-ethyl-7-(2-methyl-6-(1H-1,2,4-triazol-3-yl)pyridin-3-yl)-3,4-dihydropyrazino[2,3-b]pyrazin-2(1H)-one.本文提供關於1-乙基-7-(2-甲基-6-(1H-1,2,4-三唑-3-基)吡啶-3-基)-3,4-二氫吡并[2,3-b]吡-2(1H)-酮之調配物、方法、固態型式及使用方法。