You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[3-[[2-amino-3-(1-carbamimidoyl-2,5-dihydropyrrol-3-yl)propanoyl]amino]propanoylamino]-3-(6-methyl-1H-indol-2-yl)propanoic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H31N7O4
assistant