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system
Name the molecular formula for the molecule established as 1-[2-(2-chloro-4-methoxyphenyl)ethyl]-2-[(4,5-dimethyl-1,2,4-triazol-3-yl)methyl]-3-(2-thiophen-2-ylethyl)guanidine using the IUPAC nomenclature.
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C21H27ClN6OS
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