You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(3R)-1-(2,3-dihydro-1,4-benzodioxin-6-yl)-5-oxopyrrolidin-3-yl]-4-fluorobenzamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H17FN2O4
assistant