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 5,5-dimethyl-3-pyridin-4-yl-8,9-dihydro-6H-[1,2,4]triazolo[4,3-d][1,4]oxazepine .
user
C13H16N4O
assistant