You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 3-[(3-cyanophenyl)methyl]-2-oxo-N-pyridin-3-yl-4,5-dihydro-[1,3]oxazolo[3,2-a][1,3,5]triazepine-7-carboxamide .
user
C20H16N6O3
assistant