It had been elucidated that p-hydroxybenzoic acid exists not only as a free form but also as an ester form in a lignin molecule of the oil palm, although the existing form of the other low-molecular-weight phenolic compounds is unclear.
It had been elucidated that p-hydroxybenzoic acidexists not only as a free form but also as an ester form in alignin molecule of the oil palm, althoughthe existing form of the other low-molecular-weightphenolic compounds is unclear.