tert-butyl 3-[4-[(3,4-dichlorophenyl)methoxy]phenyl]-8-[[3-[4-(2,3-dimethyl-4-pyridinyl)phenyl]-1-methoxy-1-oxopropan-2-yl]carbamoyl]-3,6,8,9-tetrahydro-2H-[1,4]dioxino[2,3-g]isoquinoline-7-carboxylate