You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 3-[1-(2-pyridin-4-ylquinazolin-4-yl)piperidin-3-yl]-6,7,8,9-tetrahydro-5H-[1,2,4]triazolo[4,3-a]azepine into its molecular formula.
user
C25H27N7
assistant