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<3aS,4R,6aR,6S,1(R*),2(S*)>-4-(4-bromobenzyloxy)-1-methyl-3-<7-<6-<7-(2,4-dinitrophenylamino)-2-methoxy-1,3-dimethyl-3(E),5(E)-heptadienyl>-tetrahydro-2,2-dimethyl-furo<3,4-d>-1,3-dioxo-4-yl>-2-methyl-1-oxo-2(E),4(E),6(E)-heptatrienyl>-2(1H)-pyridinone