You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-(8-ethyl-6-methylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S,5R)-3,4,5-trimethylpiperazin-1-yl]isochromen-1-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C25H29N5O2
assistant