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<3aR,4S,6R,6aS,6(S*),7(R*)>-N<6-<7-<(4-bromobenzyloxy)-(1,2-dihydro-1-methyl-2-oxo-3-pyridinyl)-6-methyl-7-oxo-1(E),3(E),5(E)-heptatrienyl>tetrahydrofuro-<3,4-d>-2,2-dimethyl-1,3-dioxo-4-yl>-6-methoxy-5,7-dimethyl-2(E),4(E)-heptadienyl>acetamide