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 N-[(2R)-2-[4-[5-(4-methylpiperazine-1-carbonyl)indol-1-yl]phenyl]propyl]propane-2-sulfonamide .
user
C26H34N4O3S
assistant