You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule (Z)-3-amino-2-(2,3-difluorophenyl)-1-[5-(3-fluoropyridin-2-yl)-1H-pyrrolo[2,3-b]pyridin-3-yl]prop-2-en-1-one ?
user
C21H13F3N4O
assistant