You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule 5-[8-(4-methylpiperidin-1-yl)-2-pyridin-4-ylimidazo[1,2-a]pyrazin-3-yl]-1,3-dihydroindol-2-one ?
user
C25H24N6O
assistant