You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(2,8-dimethylimidazo[1,2-a]pyrazin-6-yl)-2-ethoxy-4-[(3R)-3-methylpiperazin-1-yl]benzamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H28N6O2
assistant