(2S)-2-[({4-[2-(2-amino-4-oxo-4,7-dihydro-3H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl]phenyl}carbonyl)amino]-4-(2H-tetrazol-5-yl)butanoic acid
(2s)-2-[({4-[2-(2-amino-4-oxo-4,7-dihydro-3h-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl]phenyl}carbonyl)amino]-4-(2h-tetrazol-5-yl)butanoic acid