You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule (3R,6S)-3-[(1R)-1-(1-propylindol-3-yl)ethyl]-6-(pyridin-2-ylmethyl)piperazine-2,5-dione ?
user
C23H26N4O2
assistant