(6E)-8-(4-hydroxy-6-methoxy-7-methyl-3-oxo-1,3-dihydro-2-benzofuran-5-yl)-(3R)-hydroxy-2,6-dimethyloct-6-enoyl-CoA + NAD(+) = (6E)-8-(4-hydroxy-6-methoxy-7-methyl-3-oxo-1,3-dihydro-2-benzofuran-5-yl)-3-oxo-2,6-dimethyloct-6-enoyl-CoA + NADH + H(+) — reaction