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 2,6-dimethyl-3-pyridin-3-yl-3a,4,8,8a-tetrahydro-3H-[1,3]dioxepino[5,6-d][1,2]oxazole .
user
C13H18N2O3
assistant