5H-Pyrrolo[3,4-d]thiazole-5-carboxylic acid,2-[[[(1R,2S,5S)-2-[[(5-chloro-1H-indol-2-yl)carbonyl]amino]-5-[(dimethylamino)carbonyl]cyclohexyl]amino]carbonyl]-4,6-dihydro-,1,1-dimethylethyl ester