You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name ethyl 2-[benzenesulfonyl-[2-[(4-carbamimidoylphenyl)methyl]-1-methylbenzimidazol-5-yl]amino]acetate into its molecular formula.
user
C26H27N5O4S
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