. "(2R,3S,4R,5R)-2-(5-((E)-2-bromovinyl)-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)-4-hydroxy-5-(hydroxymethyl)-tetrahydrofuran-3-yl 2-methoxyacetate" . "7c" . . . . . . . .