You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 9-methyl-12-(pyridin-2-ylmethyl)-2-oxa-9,12-diazatricyclo[9.2.1.03,8]tetradeca-3,5,7-trien-10-one ?
user
C18H19N3O2
assistant