You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[3-amino-6-[4-(2-aminoethyl)phenyl]pyrazin-2-yl]-2-[4-(2-propan-2-ylimidazol-1-yl)pyridin-3-yl]ethanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H27N7O
assistant