3-((6,7-DIHYDRO-5-OXO-5H-PYRROLO(2,3-D)PYRIMIDIN-4-YL)METHYLAMINO)-4-METHYL-.BETA.-OXO-1-PIPERIDINEPROPANENITRILE, (3R,4R)-
3-((6,7-dihydro-5-oxo-5h-pyrrolo(2,3-d)pyrimidin-4-yl)methylamino)-4-methyl-.beta.-oxo-1-piperidinepropanenitrile, (3r,4r)-