You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-[2-(3-but-3-ynyldiaziridin-3-yl)ethoxy]-2-[[4-(5-ethylpyrimidin-4-yl)piperazin-1-yl]methyl]-1H-indole The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H33N7O
assistant