You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as (3R)-2-[(2,3-dimethoxyphenyl)methyl]-3-methyl-N-(4-methylcyclohexyl)-1-oxo-4H-pyrazino[1,2-a]benzimidazole-3-carboxamide using the IUPAC nomenclature.
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C28H34N4O4
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