You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-(5,7-dichloro-6,7-dihydropyrazolo[1,5-a]pyrimidin-2-yl)-2,6-dimethylquinoxaline is the IUPAC name of a molecule. Please give its molecular formula.
user
C16H13Cl2N5
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