3-Piperidinecarboxylic acid, 1-[(2S)-2-[[2-[[(1,1-dimethylethoxy)carbonyl]amino]-2-methyl-1-oxopropyl]amino]-3-(1H-indol-3-yl)-1-oxopropyl]-3-(phenylmethyl)-, 1,2,2-trimethylhydrazide, (3R)-