... guaiacylglycerol-b-O-4-methylumbelliferone;GOG, guaiacylglycerol b-O-guaiacyl; GOU aO, a-O-methylumbel-liferyl-b-hydroxyl-propiovanillone; GOG aO, a-O-guaiacyl-b-hydroxyl-propiovanillone; GOUbz, O-benzyl-guaiacylglycerol-b-O-4-methylumbelliferone; ... can result in the formation of several different interunit linkages. In nativelignins, b-O-4-linkages are the most abundant and b-b-,b- 5-, 5-5 - and 5-O-4-linkages are also found. Therefore,lignins ... (GOU aO) and a-O-gua-iacyl-b-hydroxyl-propiovanillone (GOG aO) were preparedas described previously [12]. O-Benzyl-guaiacylglycerol-b-O-4-methylumbelliferone (GOUbz) and O-benzyl-guaiacyl-glycerol-b-O-guaiacyl...