(S)-2-{[(3S,8S)-3-(4-Cyclohexylmethoxy-phenyl)-7-(3-hydroxy-benzoyl)-2,3,6,7,8,9-hexahydro-[1,4]dioxino[2,3-g]isoquinoline-8-carbonyl]-amino}-3-[4-(2,3-dimethyl-pyridin-4-yloxy)-phenyl]-propionic acid