(R)-3-(4-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)-1H-pyrazol-1-yl)-3-cyclopentylpropanoic acid; 1H-Pyrazole-1-propanoic acid, beta-cyclopentyl-4-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)-,(betaR)