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system
Name the molecular formula for the molecule established as N-(5-chloro-2-methoxyphenyl)-5-oxo-2-propan-2-ylidene-1,4,6,7-tetrahydro-[1,2,4]triazolo[1,5-a]pyrimidine-7-carboxamide using the IUPAC nomenclature.
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C16H18ClN5O3
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