You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 2-[4-[[(3R)-3-(dimethylamino)pyrrolidin-1-yl]methyl]phenyl]-1-[3-[(E)-4-(methylamino)but-3-en-1-ynyl]phenyl]ethanone .
user
C26H31N3O
assistant