You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2R)-2-[1-(carboxymethyl)-6-fluoroindol-3-yl]-2-[4-(2-oxo-2-pyrrolidin-1-ylethyl)piperazin-1-yl]acetic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H27FN4O5
assistant