You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 1-[(2S)-2-[1-[4-(3-methoxyphenoxy)phenyl]imidazo[1,5-a]pyrazin-3-yl]pyrrolidin-1-yl]but-2-yn-1-one .
user
C27H24N4O3
assistant