2-Propenoic acid, 3-[3-[[(3R,5S)-7-chloro-5-(2,3-dimethoxyphenyl)-1-(2,2-dimethylpropyl)- 1,2,3,5-tetrahydro-2-oxo-4,1-benzoxazepin-3-yl]acetyl]phenyl]-, (2E)-