(4E,8E)-10-(4-hydroxy-6-methoxy-7-methyl-3-oxo-1,3-dihydro-2-benzofuran-5-yl)-(3R)-hydroxy-4,8-dimethyldeca-4,8-dienoyl-CoA = (2E,4E,8E)-10-(4-hydroxy-6-methoxy-7-methyl-3-oxo-1,3-dihydro-2-benzofuran-5-yl)-4,8-dimethyldeca-2,4,8-trienoyl-CoA + H2O — reaction