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system
Name the molecular formula for the molecule established as 1-[2-(3,5-dioxo-4-azatricyclo[5.2.1.02,6]dec-8-en-4-yl)ethyl]-3-(2-methoxy-3,3-dimethylbutyl)-2-methylguanidine;hydroiodide using the IUPAC nomenclature.
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C20H33IN4O3
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