You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(Z)-2-(6,14,17-triazatetracyclo[12.4.0.02,6.08,13]octadeca-2,4,8,10,12-pentaen-18-yl)but-2-enedioic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H19N3O4
assistant