C(OC([NH:8][CH:9]1[CH2:14][CH2:13][N:12]([C:15]2[N:20]=[C:19]([C:21]3[C:29]4[C:24](=[CH:25][CH:26]=[C:27]([C:30](=[O:32])[NH2:31])[CH:28]=4)[N:23](C(OC(C)(C)C)=O)[CH:22]=3)[CH:18]=[N:17][CH:16]=2)[CH2:11][CH2:10]1)=O)(C)(C)C.C(O)(C(F)(F)F)=O>C(Cl)(Cl)Cl>[NH2:8][CH:9]1[CH2:10][CH2:11][N:12]([C:15]2[N:20]=[C:19]([C:21]3[C:29]4[C:24](=[CH:25][CH:26]=[C:27]([C:30]([NH2:31])=[O:32])[CH:28]=4)[NH:23][CH:22]=3)[CH:18]=[N:17][CH:16]=2)[CH2:13][CH2:14]1To a mixture of tert-butyl 3-(6-(4-(tert-butoxycarbonylamino)piperidin-1-yl)pyrazin-2-yl)-5-carbamoyl-1H-indole-1-carboxylate (200 mg, 0.37 mmol) in chloroform was added TFA at 0° C. The reaction mixture was heated at 50° C. for 12 h. After removal of TFA the crude product was purified by preparative HPLC to obtain title compound (25 mg, 20%) as a brown solid. MS (ESI, pos. ion) m/z: 337.1 (M+1).
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