You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-chloro-2-(2-fluoro-6-prop-2-ynoxyphenyl)-1-methyl-6-methylidene-3H-pyridin-3-ide;yttrium is the IUPAC name of a molecule. Please give its molecular formula.
user
C16H12ClFNOY-
assistant