You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 3-[1-(2,2-dimethylpropyl)-3-methyl-2-oxoimidazo[4,5-b]pyridin-5-yl]-4-ethyl-2-fluorobenzoic acid .
user
C21H24FN3O3
assistant