(S)-2-({(3S,8S)-3-[4-(3,4-Dichloro-benzyloxy)-phenyl]-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 methyl ester dihydrochloride 、
氯甲酸异丙酯 、
Carbonochloridate 以to give the title compound (4 mg)的产率得到(3S,8S)-8-{(S)-1-carboxy-2-[4-(2,3-dimethyl-pyridin-4-yloxy)-phenyl]-ethylcarbamoyl}-3-[4-(3,4-dichloro-benzyloxy)-phenyl]-2,3,8,9-tetrahydro-6H-[1,4]dioxino[2,3-g]isoquinoline-7-carboxylic acid isopropyl ester