You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(2-chlorophenoxy)ethyl 5,7-dimethyl-[1,2,4]triazolo[1,5-a]pyrimidine-2-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C16H15ClN4O3
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