You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[5-chloro-4-[5-(8-cyano-6-methylimidazo[1,2-a]pyridin-2-yl)-1,2,4-oxadiazol-3-yl]-2-fluorophenyl]propanoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H12ClFN5O3-
assistant