METHYL (3R,4R)-4-METHYL-3-(METHYL-7H-PYRROLO(2,3-D)PYRIMIDIN-4-YLAMINO)-.BETA.-OXO-1-PIPERIDINEPROPANOATE
methyl (3r,4r)-4-methyl-3-(methyl-7h-pyrrolo(2,3-d)pyrimidin-4-ylamino)-.beta.-oxo-1-piperidinepropanoate