You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name tert-butyl 6-(6-methoxy-5-nitropyrimidin-4-yl)oxy-3,4-dihydro-1H-isoquinoline-2-carboxylate into its molecular formula.
user
C19H22N4O6
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