Aliphatic and Alicyclic Extractives

The aliphatic and alicyclic extractives of woody tissue mostly fall into two groups. The first group are the compounds involved in intermediary metabolism and their close relatives. All plants have the same general metabolic cycles, and the intermediates are thus ubiquitous in woody tissue. These intermediates are usually transient in nature, although occasionally one or more will accumulate. Others of these highly oxygenated extractives are closely related to metabolic intermediates, but here their occurrence can be quite species specific. 

---