6-Methoxy-2-pyridinecarboxaldehyde → (S)-2-{[(3S,8S)-3-[4-(3,4-Dichloro-benzyloxy)-phenyl]-7-(6-methoxy-pyridin-2-ylmethyl)-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

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(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 bis hydrochloride (30 mg) was reductively aminated with 6-methoxy-pyridine-2-carbaldehyde according to General Procedure D (with excess of aldehyde). The resulting compound was hydrolyzed according to General Procedure B to give the title compound (20 mg). LCMS (m/z): 876.

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