You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-amino-5-[(4Z,6Z)-4,8-dichloro-5-fluoro-3-methylideneocta-4,6-dien-2-yl]oxy-N-pyridin-3-ylpyridazine-3-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H18Cl2FN5O2
assistant