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-[(1R,2R,6R,7R)-3,5-dioxo-4-azatricyclo[5.2.2.02,6]undec-8-en-4-yl]-N-pyridin-3-ylpropanamide .
user
C18H19N3O3
assistant