You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(11Z)-2,5-dimethyl-2,6,7-triazatricyclo[7.6.0.03,7]pentadeca-1(9),3,5,11-tetraen-8-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C14H17N3O
assistant