You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-ethyl-N'-[(3-propan-2-yl-1,2-oxazol-5-yl)methyl]-3,4-dihydro-1H-isoquinoline-2-carboximidamide;hydroiodide into molecular formula.
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C19H27IN4O
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