You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(5S,7S)-7-(4-chlorophenyl)-5-pyridin-3-yl-4,5,6,7-tetrahydrotetrazolo[1,5-a]pyrimidine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C15H13ClN6
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