You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(2S)-2-acetamido-3-(methylamino)-3-oxopropyl]-6-(2-cyanophenyl)-2-[2-(3-fluorophenyl)ethylamino]pyridine-3-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H27FN6O3
assistant