You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(4-methylphenyl)-7-(trifluoromethyl)-4,5,6,7-tetrahydro-[1,2,4]triazolo[1,5-a]pyrimidine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C13H13F3N4
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