You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S)-2-[[6-[[(1S)-1-carboxy-2-(1H-imidazol-5-yl)ethyl]carbamoyl]pyridine-2-carbonyl]amino]-3-(1H-imidazol-5-yl)propanoic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H19N7O6
assistant