3-METHYL-.BETA.-OXO-6-(7H-PYRROLO(2,3-D)PYRIMIDIN-4-YL)-1,6-DIAZASPIRO(3.4)OCTANE-1-PROPANENITRILE, (3R,4S)-
3-methyl-.beta.-oxo-6-(7h-pyrrolo(2,3-d)pyrimidin-4-yl)-1,6-diazaspiro(3.4)octane-1-propanenitrile, (3r,4s)-