You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3Z)-N,N-dimethyl-3-(5-methyl-6-oxa-4-azatricyclo[8.4.0.03,7]tetradeca-1(14),3(7),4,10,12-pentaen-2-ylidene)propan-1-amine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H22N2O
assistant