preferred_name: 3-AMINO-5-((3R,4R)-4-METHYL-3-(METHYL(7H-PYRROLO(2,3-D)PYRIMIDIN-4-YL)AMINO)PIPERIDIN-1-YL)-2-((3R,4R)-4-METHYL-3-(METHYL(7H-PYRROLO(2,3-D)PYRIMIDIN-4-YL)AMINO)PIPERIDINE-1-CARBONYL)-5-OXOPENT-2-ENENITRILE