You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-[[2-[2-[(4-carbamimidoylanilino)methyl]-1-methylbenzimidazol-5-yl]-1-(2,5-dihydro-1H-pyrrol-2-yl)-1-oxopropan-2-yl]amino]acetic acid;dihydrochloride by IUPAC nomenclature, provide its molecular formula.
user
C25H31Cl2N7O3
assistant