PHENYLMETHYL (3R,4S)-3-(2-(((1,1-DIMETHYLETHOXY)CARBONYL)(5-((4-METHYLPHENYL)SULFONYL)-5H-PYRROLO(2,3-B)PYRAZIN-2-YL)AMINO)ACETYL)-4-ETHYL-1-PYRROLIDINECARBOXYLATE
phenylmethyl (3r,4s)-3-(2-(((1,1-dimethylethoxy)carbonyl)(5-((4-methylphenyl)sulfonyl)-5h-pyrrolo(2,3-b)pyrazin-2-yl)amino)acetyl)-4-ethyl-1-pyrrolidinecarboxylate