You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-cyclopropyl-8-[(2,6-difluorophenyl)methoxy]-5-ethylimidazo[1,2-a]pyridine-3-carboxylic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H18F2N2O3
assistant