You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[3-[5-carbamoyl-2-[(2-ethyl-5-methylpyrazole-3-carbonyl)amino]-7-methoxybenzimidazol-1-yl]propylamino]acetic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H27N7O5
assistant