You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance ethyl 7-methyl-2-pentan-3-yl-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrimidine-6-carboxylate .
user
C15H25N3O2
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