These compounds are not generally detected in GC-MS system, as their boiling point is close to water. The chemical families associated with peak "B" have a TGA degradation peak in the range of 120-130 . The compound in this families are water, acetic acid, and acetal, Which were identified by Karl Fischer titration and GC-MS system. The family "C" mostly contain monolignols and monofuranic compounds. The compounds under this family indentified by GC-MS were monophenols.