You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
9,12,13-trimethyl-8-oxa-3,5,10,11-tetrazatricyclo[7.4.0.02,7]trideca-1(13),2(7),3,11-tetraen-6-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C11H12N4O2
assistant