1,2,4-Oxadiazole-5-butanoic acid, 3-[3-[(3R,5S)-7-chloro-5-(2,3-dimethoxyphenyl)-1,2,3,5-tetrahydro-1-(3- hydroxy-2,2-dimethylpropyl)-2-oxo-4,1-benzoxazepin-3-yl]propyl]-