You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance N-[(2S)-2-[[(2S)-1-amino-1-oxopropan-2-yl]amino]-4-(4-fluorophenyl)piperazin-1-yl]pyrimidine-4-carboxamide .
user
C18H22FN7O2
assistant